chemistry basics - Menifee County Schools
... • By the 1700’s nearly all chemists had accepted the modern definition of an element as a particle that is indivisible • It was also understood at that time that elements combine to form compounds that are different in their properties than the elements that composed them – However, these understan ...
... • By the 1700’s nearly all chemists had accepted the modern definition of an element as a particle that is indivisible • It was also understood at that time that elements combine to form compounds that are different in their properties than the elements that composed them – However, these understan ...
Atomic Theory - Alvinisd.net
... revised Democritus’s ideas based on his research matter is made of tiny particles called atoms atoms of the same element are identical (size, mass, chemical properties) ...
... revised Democritus’s ideas based on his research matter is made of tiny particles called atoms atoms of the same element are identical (size, mass, chemical properties) ...
1A-2 The Atom – Building Blocks of Matter
... electrons. It is usually these electrons that are responsible for the reactive properties of the element. How many valence electrons does hydrogen have? Carbon? Neon? Valence electrons take so much focus that we usually draw only these electrons for an atom – these are called Lewis Diagrams. (se ...
... electrons. It is usually these electrons that are responsible for the reactive properties of the element. How many valence electrons does hydrogen have? Carbon? Neon? Valence electrons take so much focus that we usually draw only these electrons for an atom – these are called Lewis Diagrams. (se ...
Chapter 2 Law of
... theory • Whenever two elements form more than one compound, they combine in a ratio of small whole numbers ...
... theory • Whenever two elements form more than one compound, they combine in a ratio of small whole numbers ...
1st Semester Review - Moore Public Schools
... 16. How many sublevels would the energy level represented by n = 4 be broken up into? 17. How many orbitals does a p sublevel contain? 18. How many total electrons can the second energy level hold? 19. Explain the following, which determine electron configuration: a. Hund's rule b. Aufbau principle ...
... 16. How many sublevels would the energy level represented by n = 4 be broken up into? 17. How many orbitals does a p sublevel contain? 18. How many total electrons can the second energy level hold? 19. Explain the following, which determine electron configuration: a. Hund's rule b. Aufbau principle ...
Atomic Theory and the Evolution of Atomic Structure Democritus and
... What two hypotheses of Dalton’s Theory have been proven incorrect? Explain. ...
... What two hypotheses of Dalton’s Theory have been proven incorrect? Explain. ...
Unit 2 Atomic structure review
... 1. Who was the ancient Greek philosopher who first proposed the notion of the atom? 2. What was Dalton’s atomic model called? 3. Who’s model first introduced the concept of energy levels? 4. What were the major problems of Dalton’s atomic theory? 5. Whose model was nicked name the plum pudding model ...
... 1. Who was the ancient Greek philosopher who first proposed the notion of the atom? 2. What was Dalton’s atomic model called? 3. Who’s model first introduced the concept of energy levels? 4. What were the major problems of Dalton’s atomic theory? 5. Whose model was nicked name the plum pudding model ...
Atomic Structure Summary Sheet
... B. Law of Definite Proportions 1. Chemical compound contains the same elements in exactly the same proportions by mass regardless of the size of the sample or the compound. C. Law of Multiple Proportions ...
... B. Law of Definite Proportions 1. Chemical compound contains the same elements in exactly the same proportions by mass regardless of the size of the sample or the compound. C. Law of Multiple Proportions ...
SUMMER WORK AP Chemistry
... compound contains only carbon and hydrogen, what is its empirical formula? (b) Menthol, the substance we can smell in mentholated cough drops, is composed of C, H, and O. A 0.1005-g sample of menthol is combusted, producing 0.2829 g of CO2 and 0.1159 g of H2O. What is the empirical formula for menth ...
... compound contains only carbon and hydrogen, what is its empirical formula? (b) Menthol, the substance we can smell in mentholated cough drops, is composed of C, H, and O. A 0.1005-g sample of menthol is combusted, producing 0.2829 g of CO2 and 0.1159 g of H2O. What is the empirical formula for menth ...
Exam III Review
... Atomic Theory, History of the Atom, and Nuclear Chemistry 1. These 6 scientists were influential to atomic history. Draw and name their atomic models (if they had one) and what part of the atom they are credited with discovering. Include important experiments (such as the cathode ray tube, gold foil ...
... Atomic Theory, History of the Atom, and Nuclear Chemistry 1. These 6 scientists were influential to atomic history. Draw and name their atomic models (if they had one) and what part of the atom they are credited with discovering. Include important experiments (such as the cathode ray tube, gold foil ...
Chapter 4: Electron Configurations
... Properties of Light, continued • Light as a particle – Photoelectric effect • Emission of electrons from metal when light hits it • Red light’s frequency is too low to excite electrons ...
... Properties of Light, continued • Light as a particle – Photoelectric effect • Emission of electrons from metal when light hits it • Red light’s frequency is too low to excite electrons ...
Workshop #4 Answers
... Ammonia gas will react with oxygen gas to yield nitrogen monoxide gas and water vapor. 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) ...
... Ammonia gas will react with oxygen gas to yield nitrogen monoxide gas and water vapor. 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) ...
File - GarzScience!
... empty space and that they are the building blocks of all matter • Tiny particles could not be divided • Termed them atomos, or atoms • Means “uncut” or “indivisible” ...
... empty space and that they are the building blocks of all matter • Tiny particles could not be divided • Termed them atomos, or atoms • Means “uncut” or “indivisible” ...
key to sample questions test 2
... 6 Na(aq) + 2PO4(aq) + 3Ca(aq) +6 Cl(aq) 6 Na(aq) + 6 Cl(aq) + Ca3(PO4)2(s) u. Which one of the following is an acid base reaction? 2 HCl + Mg H2 + MgCl2 HCl + KOH H2O + KCl C(s) + O2(g) CO2(g) S8(s) + 4 Cl2 (g) 4 S2Cl2(l) v. Which of the following salts is insoluble in water? ...
... 6 Na(aq) + 2PO4(aq) + 3Ca(aq) +6 Cl(aq) 6 Na(aq) + 6 Cl(aq) + Ca3(PO4)2(s) u. Which one of the following is an acid base reaction? 2 HCl + Mg H2 + MgCl2 HCl + KOH H2O + KCl C(s) + O2(g) CO2(g) S8(s) + 4 Cl2 (g) 4 S2Cl2(l) v. Which of the following salts is insoluble in water? ...
chemistry 1
... Scientists show the composition of compounds by using a chemical formula. Water, which contains two atoms of hydrogen for each atom of oxygen, has the chemical formula H2O. The formula for table salt, NaCl, indicates that the elements that make up table salt—sodium and chlorine—combine in a 1:1 rati ...
... Scientists show the composition of compounds by using a chemical formula. Water, which contains two atoms of hydrogen for each atom of oxygen, has the chemical formula H2O. The formula for table salt, NaCl, indicates that the elements that make up table salt—sodium and chlorine—combine in a 1:1 rati ...
development of the atomic model
... There exists a “smallest piece” of matter, which cannot be divided any further. These pieces are called “ατομοσ,” or “atoms” ...
... There exists a “smallest piece” of matter, which cannot be divided any further. These pieces are called “ατομοσ,” or “atoms” ...
Page 201 - ClassZone
... locate any one electron with certainty, we say that electrons move about in an electron cloud. We do know that each electron in the electron cloud has a certain amount of energy. This energy keeps it moving about the nucleus. The energy keeps the negative electron from falling into the positive nucl ...
... locate any one electron with certainty, we say that electrons move about in an electron cloud. We do know that each electron in the electron cloud has a certain amount of energy. This energy keeps it moving about the nucleus. The energy keeps the negative electron from falling into the positive nucl ...
Chapter 3 Notes PDF Version
... ingredients and food. How atoms come together to form compounds is similar to how ingredients come together to form food. ¨ Think of a recipe for cooking or baking something and link this process to the law of conservation of mass. ¨ The amount of ingredients you put into a recipe should equal t ...
... ingredients and food. How atoms come together to form compounds is similar to how ingredients come together to form food. ¨ Think of a recipe for cooking or baking something and link this process to the law of conservation of mass. ¨ The amount of ingredients you put into a recipe should equal t ...
Atoms and moles
... ingredients and food. How atoms come together to form compounds is similar to how ingredients come together to form food. Think of a recipe for cooking or baking something and link this process to the law of conservation of mass. The amount of ingredients you put into a recipe should equal the amoun ...
... ingredients and food. How atoms come together to form compounds is similar to how ingredients come together to form food. Think of a recipe for cooking or baking something and link this process to the law of conservation of mass. The amount of ingredients you put into a recipe should equal the amoun ...
Chapter 5 Review - Net Start Class
... was the first person to theorize the existence of the atom in 400 BC? Democritus ...
... was the first person to theorize the existence of the atom in 400 BC? Democritus ...
Ch. 4 Statement of Evidence Atoms + Notes Outline
... 1. Where does the word “atom” come from? What did it mean? (pg. 82) “atom” is from Greek word “atomos” means not able to be divided Atom defined is: the smallest particle in which an element can be divided 2. Whose atomic theory was right, Aristotle or Democritus? What did his theory say? (pg. 82) D ...
... 1. Where does the word “atom” come from? What did it mean? (pg. 82) “atom” is from Greek word “atomos” means not able to be divided Atom defined is: the smallest particle in which an element can be divided 2. Whose atomic theory was right, Aristotle or Democritus? What did his theory say? (pg. 82) D ...
Chemical Reactions
... • Product – what is made during the chemical reaction • Law of conservation of mass (or matter)- mass is neither created or destroyed in ordinary chemical or physical changes • Subscript - number (representing atoms) written below and to the right of a chemical symbol ...
... • Product – what is made during the chemical reaction • Law of conservation of mass (or matter)- mass is neither created or destroyed in ordinary chemical or physical changes • Subscript - number (representing atoms) written below and to the right of a chemical symbol ...
CHEMISTRY IM 06 SYLLABUS
... Section B will consist of five compulsory structured questions; Section C will require candidates to choose two out of four long questions. Each section carries equal marks. The minimum mathematical requirements of the syllabus are the same as those for the SEC examination in Chemistry. Questions wi ...
... Section B will consist of five compulsory structured questions; Section C will require candidates to choose two out of four long questions. Each section carries equal marks. The minimum mathematical requirements of the syllabus are the same as those for the SEC examination in Chemistry. Questions wi ...
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.