Text Questions from Corwin - Teach-n-Learn-Chem
... 39. In a hydrogen discharge tube, excited H atoms have electrons in a _____ energy orbit. Because this is an _________ state, the electron _______ to a lower level. In doing so, the electron ______ a definite amount of energy; this corresponds to a ________ of light energy. The energy of the _______ ...
... 39. In a hydrogen discharge tube, excited H atoms have electrons in a _____ energy orbit. Because this is an _________ state, the electron _______ to a lower level. In doing so, the electron ______ a definite amount of energy; this corresponds to a ________ of light energy. The energy of the _______ ...
Valence Electrons and Lewis Dot Diagrams
... Valence electrons are the electrons in the highest energy level for an atom. They are the electrons involved with bonding between atoms. Knowing how many valence electrons there are for a specific atom will help you understand the type of bond that forms and what other atoms it will tend to bond wit ...
... Valence electrons are the electrons in the highest energy level for an atom. They are the electrons involved with bonding between atoms. Knowing how many valence electrons there are for a specific atom will help you understand the type of bond that forms and what other atoms it will tend to bond wit ...
A Review of High School Chemistry
... Dalton came along in the early 1800s and proposed that these elemental materials were made up of very small, indivisible particles he called ATOMS. Dalton was to provide the framework for a theory, which although not perfect, launched the modern age of chemistry and physics. Here are some ideas of D ...
... Dalton came along in the early 1800s and proposed that these elemental materials were made up of very small, indivisible particles he called ATOMS. Dalton was to provide the framework for a theory, which although not perfect, launched the modern age of chemistry and physics. Here are some ideas of D ...
4.5 Physical properties of molecular covalent
... Covalent molecules are not charged because they are overall neutral and therefore do not conduct electricity. • Some covalent molecules can react with water and produce free ions which can carry an electrical current. • E.g. ammonia, NH3 NH3 (l) + H2O (l) ↔ NH4+ (aq) + OH- (aq) ...
... Covalent molecules are not charged because they are overall neutral and therefore do not conduct electricity. • Some covalent molecules can react with water and produce free ions which can carry an electrical current. • E.g. ammonia, NH3 NH3 (l) + H2O (l) ↔ NH4+ (aq) + OH- (aq) ...
The Atom PPT - Cobb Learning
... • Atoms are extremely small. Ordinary-sized objects are made up of very large numbers of atoms. • Atoms consist of a nucleus, which has protons and usually neutrons, and electrons, located in electron clouds around the nucleus. • The number of protons in the nucleus of an atom is that atom’s atomic ...
... • Atoms are extremely small. Ordinary-sized objects are made up of very large numbers of atoms. • Atoms consist of a nucleus, which has protons and usually neutrons, and electrons, located in electron clouds around the nucleus. • The number of protons in the nucleus of an atom is that atom’s atomic ...
Packet
... b. are used to make other elements c. are used to make compounds d. are never found in the periodic table of elements 24. Chemical reactions can be used to separate a. elements b. pure substances b. mixtures d. compounds 25. A change in the force of Earth’s gravity on an object will affect its a. ma ...
... b. are used to make other elements c. are used to make compounds d. are never found in the periodic table of elements 24. Chemical reactions can be used to separate a. elements b. pure substances b. mixtures d. compounds 25. A change in the force of Earth’s gravity on an object will affect its a. ma ...
Physical Properties
... masses accurately, the law became obsolete. Dobereiner’s research made chemists look at groups of elements with similar chemical and physical properties. ...
... masses accurately, the law became obsolete. Dobereiner’s research made chemists look at groups of elements with similar chemical and physical properties. ...
Introduction to particle physics
... - importance of the relative weights of atoms in obtaining the composition of other substances Law of multiple proportions: “if substance A combines with substance B in two or more ways forming substances C and D, then if mass A is held constant, the masses of B in the various products will be relat ...
... - importance of the relative weights of atoms in obtaining the composition of other substances Law of multiple proportions: “if substance A combines with substance B in two or more ways forming substances C and D, then if mass A is held constant, the masses of B in the various products will be relat ...
C2 Chemistry - Burton Borough School
... ATOMIC NUMBER (proton number/the small one) The number of outer shell electrons match the group the element is found in. E.g. Lithium 2,1 is a group 1 element. ...
... ATOMIC NUMBER (proton number/the small one) The number of outer shell electrons match the group the element is found in. E.g. Lithium 2,1 is a group 1 element. ...
1. Of the three major categories of elements (metals, non
... They are called groups or families. 12. What are the horizontal rows on the periodic table called? They are called periods. 13. Explain the relationship between elements in the same group. They have similar chemical and physical properties because each one has the same number of valence electrons. ...
... They are called groups or families. 12. What are the horizontal rows on the periodic table called? They are called periods. 13. Explain the relationship between elements in the same group. They have similar chemical and physical properties because each one has the same number of valence electrons. ...
Development of Atomic Theory Paragraph
... __(3)__, that matter cannot be created or destroyed. Then __(4)__ proposed, in his law of __(5)__, that the ratio of the masses of elements in any given compound is always the same. The law of __(6)__, proposed soon after, states that the masses of one element that combine with a fixed mass of anoth ...
... __(3)__, that matter cannot be created or destroyed. Then __(4)__ proposed, in his law of __(5)__, that the ratio of the masses of elements in any given compound is always the same. The law of __(6)__, proposed soon after, states that the masses of one element that combine with a fixed mass of anoth ...
Name: Period
... 1. Describe the quantum mechanical model of an atom? 2. Which scientist developed the quantum mechanical model of an atom? 3. What are the shapes of an s and p orbitals? 4. What is a principal energy level, sublevel and atomic orbital? 5. What is the maximum number in each s, p, d and f orbitals? 6. ...
... 1. Describe the quantum mechanical model of an atom? 2. Which scientist developed the quantum mechanical model of an atom? 3. What are the shapes of an s and p orbitals? 4. What is a principal energy level, sublevel and atomic orbital? 5. What is the maximum number in each s, p, d and f orbitals? 6. ...
first test
... Don't forget to count coefficients of one. ___ Al + ___ H2SO4 ___ Al2(SO4)3 + ___ H2 The sum of the coefficients is A. 3. B. 5. C. 6. D. 9. E. 12. ...
... Don't forget to count coefficients of one. ___ Al + ___ H2SO4 ___ Al2(SO4)3 + ___ H2 The sum of the coefficients is A. 3. B. 5. C. 6. D. 9. E. 12. ...
Distinguishing Between Atoms
... Since the mass of atoms is so increadibly small, a unit known as an atomic mass unit (amu) was defined to make the masses of atoms easier to work with. •The amu is defined by the carbon-12 isotope of carbon. •1 amu is equal to 1/12 the mass of the carbon-12 isotope. (roughly the mass of a neutron or ...
... Since the mass of atoms is so increadibly small, a unit known as an atomic mass unit (amu) was defined to make the masses of atoms easier to work with. •The amu is defined by the carbon-12 isotope of carbon. •1 amu is equal to 1/12 the mass of the carbon-12 isotope. (roughly the mass of a neutron or ...
Bellringer Chapter 11 Objectives Chapter 11 The Beginning of the
... • Democritus thought that matter is composed of indivisible atoms. • Dalton based his theory on observations of how elements combine. • Thomson discovered electrons in atoms. • Rutherford discovered that atoms are mostly empty space with a dense, positive nucleus. • Bohr proposed that electrons are ...
... • Democritus thought that matter is composed of indivisible atoms. • Dalton based his theory on observations of how elements combine. • Thomson discovered electrons in atoms. • Rutherford discovered that atoms are mostly empty space with a dense, positive nucleus. • Bohr proposed that electrons are ...
Answers
... 4. In the gas model of helium, how are helium atoms/molecules represented? Why do you think this model represents helium differently from the orbital model? Is that a good or a bad thing? In the gas model, each helium atom’s orbital cloud of electrons is represented as a solid sphere. Solid sphere m ...
... 4. In the gas model of helium, how are helium atoms/molecules represented? Why do you think this model represents helium differently from the orbital model? Is that a good or a bad thing? In the gas model, each helium atom’s orbital cloud of electrons is represented as a solid sphere. Solid sphere m ...
1. some basic concepts of chemistry
... Every experimental measurement has some amount of uncertainty associated with it. The uncertainty in the experimental or the calculated values is indicated by mentioning the number of significant figures. Significant figures are meaningful digits which are known with certainty. The uncertainty is in ...
... Every experimental measurement has some amount of uncertainty associated with it. The uncertainty in the experimental or the calculated values is indicated by mentioning the number of significant figures. Significant figures are meaningful digits which are known with certainty. The uncertainty is in ...
Chemistry Topic III – The Atom
... Greek meaning “uncuttable” or “indivisible.” 3. Aristotle (384 B.C. – 322 B.C.), another Greek philosopher, disagreed with Democritus and believed matter was _________________ and infinitely _________________. a. In fact, he proposed matter was made of four elements: earth, air, fire and water. 4. H ...
... Greek meaning “uncuttable” or “indivisible.” 3. Aristotle (384 B.C. – 322 B.C.), another Greek philosopher, disagreed with Democritus and believed matter was _________________ and infinitely _________________. a. In fact, he proposed matter was made of four elements: earth, air, fire and water. 4. H ...
HonorsChemUnit2AtomStudyGuide-realignedwoScientists
... Albert Einstein explained the photoelectric effect using Planck’s idea about quanta and called the packets of light photons. Photoelectric effect = Emission of electrons from a metal when light is shone on it. Photon = A discrete packet of light energy. - Einstein reasoned that photons contained spe ...
... Albert Einstein explained the photoelectric effect using Planck’s idea about quanta and called the packets of light photons. Photoelectric effect = Emission of electrons from a metal when light is shone on it. Photon = A discrete packet of light energy. - Einstein reasoned that photons contained spe ...
File
... Each element is composed of tiny indestructible particles called atoms All atoms of a given element have the same mass and properties that distinguishes them from other atoms/elements Atoms combine in simple, whole number ratios to form compounds ...
... Each element is composed of tiny indestructible particles called atoms All atoms of a given element have the same mass and properties that distinguishes them from other atoms/elements Atoms combine in simple, whole number ratios to form compounds ...
Atomic Theory Webquest
... http://www.mhs-chiefs.org/faculty/science/austinm/Atomictheory/sld001.htm http://www.howe.k12.ok.us/~jimaskew/psubatm.htm ...
... http://www.mhs-chiefs.org/faculty/science/austinm/Atomictheory/sld001.htm http://www.howe.k12.ok.us/~jimaskew/psubatm.htm ...
Atomic Theory WebQuest PDF
... http://www.mhs-chiefs.org/faculty/science/austinm/Atomictheory/sld001.htm http://www.howe.k12.ok.us/~jimaskew/psubatm.htm ...
... http://www.mhs-chiefs.org/faculty/science/austinm/Atomictheory/sld001.htm http://www.howe.k12.ok.us/~jimaskew/psubatm.htm ...
Chapter 9 Chemical Bonding
... formation of a covalent bond.) Continue doing this until each atom has an octet (exceptions are H, Be, B, Al, elements on rows 3, 4, 5, and 6.) No electrons should be left unpaired (only in rare cases will a species contain an unpaired electron.) For those atoms that can have more than an octet, if ...
... formation of a covalent bond.) Continue doing this until each atom has an octet (exceptions are H, Be, B, Al, elements on rows 3, 4, 5, and 6.) No electrons should be left unpaired (only in rare cases will a species contain an unpaired electron.) For those atoms that can have more than an octet, if ...
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.