class XI CHEMISTRY - Kendriya Vidyalaya No.1 Ichhanath Surat
... According to this law equal volumes of gases at the same temperature and pressure should contain equal number of molecules. Dalton's Atomic Theory All substances are made up of tiny, indivisible particles called atoms. Atoms of the same element are identical in shape, size, mass and otherproperties. ...
... According to this law equal volumes of gases at the same temperature and pressure should contain equal number of molecules. Dalton's Atomic Theory All substances are made up of tiny, indivisible particles called atoms. Atoms of the same element are identical in shape, size, mass and otherproperties. ...
Calculation Booklet - Clydebank High School
... Enthalpy of Solution Enthalpy of solution of a substance is the energy change when one mole of that substance dissolves in excess water. Enthalpy of solution may be exothermic or endothermic. Worked Example (Note: the method is not always identical) 4g of ammonium nitrate, NH4NO3, is dissolved comp ...
... Enthalpy of Solution Enthalpy of solution of a substance is the energy change when one mole of that substance dissolves in excess water. Enthalpy of solution may be exothermic or endothermic. Worked Example (Note: the method is not always identical) 4g of ammonium nitrate, NH4NO3, is dissolved comp ...
class XI CHEMISTRY - Kendriya Vidyalaya No.1 Harni Road
... According to this law equal volumes of gases at the same temperature and pressure should contain equal number of molecules. Dalton's Atomic Theory All substances are made up of tiny, indivisible particles called atoms. Atoms of the same element are identical in shape, size, mass and otherproperties. ...
... According to this law equal volumes of gases at the same temperature and pressure should contain equal number of molecules. Dalton's Atomic Theory All substances are made up of tiny, indivisible particles called atoms. Atoms of the same element are identical in shape, size, mass and otherproperties. ...
- Kendriya Vidyalaya No. 2 Raipur
... According to this law equal volumes of gases at the same temperature and pressure should contain equal number of molecules. Dalton's Atomic Theory All substances are made up of tiny, indivisible particles called atoms. Atoms of the same element are identical in shape, size, mass and otherproperties. ...
... According to this law equal volumes of gases at the same temperature and pressure should contain equal number of molecules. Dalton's Atomic Theory All substances are made up of tiny, indivisible particles called atoms. Atoms of the same element are identical in shape, size, mass and otherproperties. ...
Textbook sample chapter
... NASA’s Curiosity Rover landed in the Gale Crater on Mars in August 2012. Its main mission was to investigate whether Mars has ever possessed the environmental conditions that could support life, as well as finding out about Martian climate and geology. Curiosity Rover contains an on-board science la ...
... NASA’s Curiosity Rover landed in the Gale Crater on Mars in August 2012. Its main mission was to investigate whether Mars has ever possessed the environmental conditions that could support life, as well as finding out about Martian climate and geology. Curiosity Rover contains an on-board science la ...
Organic Chemistry Organic Chemistry
... We will begin our study of organic families with a review of hydrocarbons, many of which contain multiple bonds between carbon atoms, a functional group with characteristic properties. Fossil fuels (Figure 1) contain mainly hydrocarbons: simple molecules of hydrogen and carbon that are the result of ...
... We will begin our study of organic families with a review of hydrocarbons, many of which contain multiple bonds between carbon atoms, a functional group with characteristic properties. Fossil fuels (Figure 1) contain mainly hydrocarbons: simple molecules of hydrogen and carbon that are the result of ...
General Chemistry Discretes Test
... choice by realizing that water is not more polar that HF. Hydrogen fluoride has a greater charge separation between its constituent atoms and thus has a more polar bond. Choice B says that water has a higher boiling point because it can form more hydrogen bonds. Hydrogen bonding does affect boiling ...
... choice by realizing that water is not more polar that HF. Hydrogen fluoride has a greater charge separation between its constituent atoms and thus has a more polar bond. Choice B says that water has a higher boiling point because it can form more hydrogen bonds. Hydrogen bonding does affect boiling ...
CLUE - virtual laboratories
... combination that leads to the widespread public misunderstanding of chemical principles. How many times do we hear about “natural remedies, without drugs or chemicals,” despite the fact that everything is composed of chemicals and the most toxic chemicals known are natural products.2 A growing body ...
... combination that leads to the widespread public misunderstanding of chemical principles. How many times do we hear about “natural remedies, without drugs or chemicals,” despite the fact that everything is composed of chemicals and the most toxic chemicals known are natural products.2 A growing body ...
structure of atom
... The existence of atoms has been proposed since the time of early Indian and Greek philosophers (400 B.C.) who were of the view that atoms are the fundamental building blocks of matter. According to them, the continued subdivisions of matter would ultimately yield atoms which would not be further div ...
... The existence of atoms has been proposed since the time of early Indian and Greek philosophers (400 B.C.) who were of the view that atoms are the fundamental building blocks of matter. According to them, the continued subdivisions of matter would ultimately yield atoms which would not be further div ...
F321: Atoms, Bonds and Groups Electron Structure
... Table 1 provides data on elements in Period 2 of the Periodic Table. Table 2 shows the first 6 successive ionisation energies of an element X, which is in Period 3 of the Periodic Table. Using Table 1, describe and explain the trend in first ionisation energies shown by the Period 2 elements, Li–N. ...
... Table 1 provides data on elements in Period 2 of the Periodic Table. Table 2 shows the first 6 successive ionisation energies of an element X, which is in Period 3 of the Periodic Table. Using Table 1, describe and explain the trend in first ionisation energies shown by the Period 2 elements, Li–N. ...
Grade 11 Unit 8 - Amazon Web Services
... are known, and every year more than 100,000 new organic compounds are produced. ...
... are known, and every year more than 100,000 new organic compounds are produced. ...
1 Structure of Atom
... ohn Dalton (1805) considered that all matter was composed of small particles called atoms. He visualised the atom as a hard solid individual particle incapable of subdivision. At the end of the nineteenth century there accumulated enough experimental evidence to show that the atom is made of still s ...
... ohn Dalton (1805) considered that all matter was composed of small particles called atoms. He visualised the atom as a hard solid individual particle incapable of subdivision. At the end of the nineteenth century there accumulated enough experimental evidence to show that the atom is made of still s ...
PSN Chapter 14 Multi-format Test.tst
... repeated. This pattern is called ____________________ Short Answer 13. Two particles found in the nucleus of most atoms have masses equivalent to one atomic mass unit, or 1 amu. Name the particles. ...
... repeated. This pattern is called ____________________ Short Answer 13. Two particles found in the nucleus of most atoms have masses equivalent to one atomic mass unit, or 1 amu. Name the particles. ...
Revised Syllabus - M. Sc. First Year - Chemistry
... fugacity and determination of fugacity by graphical method, numericals. Non-ideal systems: Activity, activity coefficient, Debye-Huckel theory for activity coefficient of electrolytic solutions, determination of activity and activity coefficients, ionic strength, numerical on ionic strength and Deb ...
... fugacity and determination of fugacity by graphical method, numericals. Non-ideal systems: Activity, activity coefficient, Debye-Huckel theory for activity coefficient of electrolytic solutions, determination of activity and activity coefficients, ionic strength, numerical on ionic strength and Deb ...
General Chemistry Questions
... a. an end to the liquid-gas line in a phase diagram. b. the relationship between the boiling point, melting point and vapor pressure of a substance. c. the point on a phase diagram where solid, liquid, and gas are in equilibrium. d. the three pieces of data needed to solve the Clausius-Clapeyron equ ...
... a. an end to the liquid-gas line in a phase diagram. b. the relationship between the boiling point, melting point and vapor pressure of a substance. c. the point on a phase diagram where solid, liquid, and gas are in equilibrium. d. the three pieces of data needed to solve the Clausius-Clapeyron equ ...
7. A timeline of symbols and signs in chemistry
... its full name, called its symbol. This is, where practicable, the first letter of its Latin name. Simply as abbreviations of the full names symbols and formulae are of great service; this, however, is but a small part of their significance and value in chemistry. Their further use may best be explai ...
... its full name, called its symbol. This is, where practicable, the first letter of its Latin name. Simply as abbreviations of the full names symbols and formulae are of great service; this, however, is but a small part of their significance and value in chemistry. Their further use may best be explai ...
inorganic chemistry
... 3. Melting and boiling points The melting and boiling points of halogens increase with increase in atomic number down the group. Explanation: The forces existing between these molecules are weak Van der Waals forces, which increase down the group. This is also clear from the change of state from flu ...
... 3. Melting and boiling points The melting and boiling points of halogens increase with increase in atomic number down the group. Explanation: The forces existing between these molecules are weak Van der Waals forces, which increase down the group. This is also clear from the change of state from flu ...
Chapter 18: The Representative Elements The Representative
... Electron configuration is ns1(n = period number). Lose their valence e- easily (great reducing agents). Most violently reactive of all the metals. React strongly with H2O(l); the vigor of the reaction increases down the group. The alkali metals are all too easily oxidized to be found in thei ...
... Electron configuration is ns1(n = period number). Lose their valence e- easily (great reducing agents). Most violently reactive of all the metals. React strongly with H2O(l); the vigor of the reaction increases down the group. The alkali metals are all too easily oxidized to be found in thei ...
Chapter 18: The Representative Elements
... All group 2 elements except for beryllium react with water and the vigor of the reaction increases going down the group. Chapter 18: The Representative Elements ...
... All group 2 elements except for beryllium react with water and the vigor of the reaction increases going down the group. Chapter 18: The Representative Elements ...
stoichiometric relationships - Assets
... The molecular formula is a whole number multiple of the empirical formula. For example, if the empirical formula of a compound is CH2, the molecular formula is (CH2)n; i.e. C2H4 or C3H6 or C4H8 etc. ...
... The molecular formula is a whole number multiple of the empirical formula. For example, if the empirical formula of a compound is CH2, the molecular formula is (CH2)n; i.e. C2H4 or C3H6 or C4H8 etc. ...
Chapter 9 - HCC Learning Web
... 60. Nitrous oxide, N2O, is sometimes called "laughing gas". What is the formal charge on the central nitrogen atom in the best Lewis structure for nitrous oxide? (The atom connectivity is N-N-O.) A. -2 B. -1 C. 0 D. +1 E. +2 62. In the Lewis structure of the iodate ion, IO3-, that satisfies the octe ...
... 60. Nitrous oxide, N2O, is sometimes called "laughing gas". What is the formal charge on the central nitrogen atom in the best Lewis structure for nitrous oxide? (The atom connectivity is N-N-O.) A. -2 B. -1 C. 0 D. +1 E. +2 62. In the Lewis structure of the iodate ion, IO3-, that satisfies the octe ...
BASIC CONCEPTS OF CHEMISTRY
... bodies extracted from the space, is called the system . If no mass and heat transfer exists between the system and the surrounding environment, the system is called isolated. If this condition is not met, then the system is called open. If the system is only possible for the heat transfer , it is ca ...
... bodies extracted from the space, is called the system . If no mass and heat transfer exists between the system and the surrounding environment, the system is called isolated. If this condition is not met, then the system is called open. If the system is only possible for the heat transfer , it is ca ...
Surviving Chemistry - Bremen High School District 228
... For example, there are a few different atoms of the element Lithium. All atoms of Lithium contain the same number of protons in their nucleus. The difference between these atoms is the number of neutrons. Since all Lithium atoms have the same number of protons (3), they all have the same atomic numb ...
... For example, there are a few different atoms of the element Lithium. All atoms of Lithium contain the same number of protons in their nucleus. The difference between these atoms is the number of neutrons. Since all Lithium atoms have the same number of protons (3), they all have the same atomic numb ...
Notes for Quarter I
... light passing through a prism can be separated into its component colors because of refraction also (Fig. 7, p. 648). Diffraction is the bending of waves around barriers or through openings. Light waves can’t diffract much around large obstacles such as buildings (which is why we can’t see around co ...
... light passing through a prism can be separated into its component colors because of refraction also (Fig. 7, p. 648). Diffraction is the bending of waves around barriers or through openings. Light waves can’t diffract much around large obstacles such as buildings (which is why we can’t see around co ...
Physical Science e
... students with skill practice. The fun activities can be used to supplement and enhance what you are teaching in your classroom. Give an activity page to students as independent class work, or send the pages home as homework to reinforce skills taught in class. An answer key is provided for quick ref ...
... students with skill practice. The fun activities can be used to supplement and enhance what you are teaching in your classroom. Give an activity page to students as independent class work, or send the pages home as homework to reinforce skills taught in class. An answer key is provided for quick ref ...
History of molecular theory
In chemistry, the history of molecular theory traces the origins of the concept or idea of the existence of strong chemical bonds between two or more atoms.The modern concept of molecules can be traced back towards pre-scientific Greek philosophers such as Leucippus who argued that all the universe is composed of atoms and voids. Circa 450 BC Empedocles imagined fundamental elements (fire (20px), earth (20px), air (20px), and water (20px)) and ""forces"" of attraction and repulsion allowing the elements to interact. Prior to this, Heraclitus had claimed that fire or change was fundamental to our existence, created through the combination of opposite properties. In the Timaeus, Plato, following Pythagoras, considered mathematical entities such as number, point, line and triangle as the fundamental building blocks or elements of this ephemeral world, and considered the four elements of fire, air, water and earth as states of substances through which the true mathematical principles or elements would pass. A fifth element, the incorruptible quintessence aether, was considered to be the fundamental building block of the heavenly bodies. The viewpoint of Leucippus and Empedocles, along with the aether, was accepted by Aristotle and passed to medieval and renaissance Europe. A modern conceptualization of molecules began to develop in the 19th century along with experimental evidence for pure chemical elements and how individual atoms of different chemical substances such as hydrogen and oxygen can combine to form chemically stable molecules such as water molecules.