atom
... • First thought by Aristotle to be a combination of four elements—earth, air, fire, and water • Thought to be composed of atoms by Greeks from the fifth century BC • Further proposed as atoms in 1800s by meteorologists and schoolteacher John Dalton ...
... • First thought by Aristotle to be a combination of four elements—earth, air, fire, and water • Thought to be composed of atoms by Greeks from the fifth century BC • Further proposed as atoms in 1800s by meteorologists and schoolteacher John Dalton ...
x 1011
... • The identity of an element is determined by the number of protons in the nucleus. For example: any atom with 6 protons in the nucleus is a Carbon atom. • The number of protons in the nucleus = atomic number (Z) ...
... • The identity of an element is determined by the number of protons in the nucleus. For example: any atom with 6 protons in the nucleus is a Carbon atom. • The number of protons in the nucleus = atomic number (Z) ...
Atom and Molecules
... whole is electrically neutral. Although Thomson’s model explained that atoms are electrically neutral, the results of experiments carried out by other scientists could not be explained by this model. ...
... whole is electrically neutral. Although Thomson’s model explained that atoms are electrically neutral, the results of experiments carried out by other scientists could not be explained by this model. ...
Ch. 41 Atomic Structure
... This is consistent with our model of multielectron atoms. Bombarding an atom with a high-energy electron can knock an atomic electron out of the innermost K shell. K x rays are produced when an electron from the L shell falls into the K-shell vacancy. The energy of an electron in each shell depends ...
... This is consistent with our model of multielectron atoms. Bombarding an atom with a high-energy electron can knock an atomic electron out of the innermost K shell. K x rays are produced when an electron from the L shell falls into the K-shell vacancy. The energy of an electron in each shell depends ...
Unit 2: Atomic Concepts and Periodic Table (Level 1)
... not all columns or groups qualify as “families.” In fact, the only groups that are considered to be families are Group I (Alkalai Metals), Group II (Alkaline Earth Metals), Group XVII (Halogens), and Group XVIII (Noble Gases). The behaviors of the transition metals are very difficult to predict, and ...
... not all columns or groups qualify as “families.” In fact, the only groups that are considered to be families are Group I (Alkalai Metals), Group II (Alkaline Earth Metals), Group XVII (Halogens), and Group XVIII (Noble Gases). The behaviors of the transition metals are very difficult to predict, and ...
4.1 Section Assessment
... From his experiments, Rutherford concluded that an atom is made of a positively-charged nucleus surrounded by a region of empty space in which electrons orbit that nucleus. Rutherford believed that an atom’s nucleus was very tiny compared to the atom as a whole, and that, in spite of this, the nucle ...
... From his experiments, Rutherford concluded that an atom is made of a positively-charged nucleus surrounded by a region of empty space in which electrons orbit that nucleus. Rutherford believed that an atom’s nucleus was very tiny compared to the atom as a whole, and that, in spite of this, the nucle ...
Atoms and Molecules
... carbon dioxide and water. What mass of sodium carbonate would have been originally present if 5.0 L of carbon dioxide was produced? [hint - molar volume of a gas is 22.414 L/mol] Na2CO3 + HCl NaCl + CO2 + H2O ...
... carbon dioxide and water. What mass of sodium carbonate would have been originally present if 5.0 L of carbon dioxide was produced? [hint - molar volume of a gas is 22.414 L/mol] Na2CO3 + HCl NaCl + CO2 + H2O ...
Chemical Reactions and Equations
... reaction, without being changed or used up by the reaction. ...
... reaction, without being changed or used up by the reaction. ...
Balancing Equations
... compound. Subscripts are determined by the valence electrons (charges for ionic or sharing for covalent) n Think ...
... compound. Subscripts are determined by the valence electrons (charges for ionic or sharing for covalent) n Think ...
Practice Exam-Final Fall 2016 W-Ans
... allowed? Hint: l can have only 0, 1, 2, 3, ……(n-1), but no negative numbers. ...
... allowed? Hint: l can have only 0, 1, 2, 3, ……(n-1), but no negative numbers. ...
chemical reaction
... The total (sum) of the oxidation state of all the atoms in a molecule or formula unit is 0. For an ion total of the oxidation state is equal to the charge on the ion. In their compounds the alkali metals (1a groups Li, Na, K, Rb, Cs, Fr) have an +1 oxidation number. 2A group metals +2. In its compou ...
... The total (sum) of the oxidation state of all the atoms in a molecule or formula unit is 0. For an ion total of the oxidation state is equal to the charge on the ion. In their compounds the alkali metals (1a groups Li, Na, K, Rb, Cs, Fr) have an +1 oxidation number. 2A group metals +2. In its compou ...
Matter
... • Common name for oxidation reaction • Burning means reacting with oxygen • Burning is chemical change, because original substance is changed into new kinds of matter Ex: CH4(g) + 2O2(g) CO2(g) + 2H2O(g) ...
... • Common name for oxidation reaction • Burning means reacting with oxygen • Burning is chemical change, because original substance is changed into new kinds of matter Ex: CH4(g) + 2O2(g) CO2(g) + 2H2O(g) ...
Camp 1 - Quynh Nguyen Official Website
... • Liquid is a fluid form of matter. • Liquid has a constant volume but takes the shape of ...
... • Liquid is a fluid form of matter. • Liquid has a constant volume but takes the shape of ...
History of Atomic Theory
... • Rutherford’s experiment (see next slide) involved firing a stream of positively (+) charged “bullets” – called alpha particles (actually, helium nuclei) -- at a thin sheet of gold foil about 2000 atoms thick. • Most of the positively charged alpha particle “bullets” passed nearly straight through ...
... • Rutherford’s experiment (see next slide) involved firing a stream of positively (+) charged “bullets” – called alpha particles (actually, helium nuclei) -- at a thin sheet of gold foil about 2000 atoms thick. • Most of the positively charged alpha particle “bullets” passed nearly straight through ...
Students will review concepts from their quiz and then correct it at
... The atoms are ___chemically___ combined in some way. Often times (but not always) they come together to form groups of atoms called molecules. A compound is always homogeneous (uniform). Compounds ___cannot___ be separated by physical means. Separating a compound requires a chemical reaction. The pr ...
... The atoms are ___chemically___ combined in some way. Often times (but not always) they come together to form groups of atoms called molecules. A compound is always homogeneous (uniform). Compounds ___cannot___ be separated by physical means. Separating a compound requires a chemical reaction. The pr ...
Reading 2.1 A Return to Isotopes
... This whole discussion of isotopes brings us back to Dalton’s atomic theory. According to Dalton, atoms of a given element are identical. But if atoms of a given element can have different numbers of neutrons, then they can have different masses as well. How did Dalton miss this? It turns out that el ...
... This whole discussion of isotopes brings us back to Dalton’s atomic theory. According to Dalton, atoms of a given element are identical. But if atoms of a given element can have different numbers of neutrons, then they can have different masses as well. How did Dalton miss this? It turns out that el ...
1 • Introduction The Scientific Method (1 of 20) 1
... know their specific heats. Notice that this is simply heating or cooling a substance, not changing its phase. ...
... know their specific heats. Notice that this is simply heating or cooling a substance, not changing its phase. ...
Chemistry Ch3 Honors
... • Atoms of a given element are identical in physical (size/mass) and chemical properties. • Atoms of different elements differ in physical (size/mass) and chemical properties. • Atoms of different elements combine in simple, wholenumber ratios to form chemical compounds. • In chemical reactions, ato ...
... • Atoms of a given element are identical in physical (size/mass) and chemical properties. • Atoms of different elements differ in physical (size/mass) and chemical properties. • Atoms of different elements combine in simple, wholenumber ratios to form chemical compounds. • In chemical reactions, ato ...
Classification of Matter
... or more atoms that are chemically bonded Smallest part of a compound that has the same properties of that compound ...
... or more atoms that are chemically bonded Smallest part of a compound that has the same properties of that compound ...
Year End Review
... 11. Which of the following statements is FALSE concerning the elements X, Y, Z and their ions? a. The ions X- and Z+ would have the same number of electrons as neutral atoms of element Y. b. Atoms of element Y would react with either those of elements X or Z. c. Element X would form a compound with ...
... 11. Which of the following statements is FALSE concerning the elements X, Y, Z and their ions? a. The ions X- and Z+ would have the same number of electrons as neutral atoms of element Y. b. Atoms of element Y would react with either those of elements X or Z. c. Element X would form a compound with ...
ALE 23. Balancing Redox Reactions
... electrons to another atom thereby causing that atom to be reduced. The species being reduced serves as the oxidizing agent because it removes electrons from another substance, thereby causing that substance to be oxidized. ...
... electrons to another atom thereby causing that atom to be reduced. The species being reduced serves as the oxidizing agent because it removes electrons from another substance, thereby causing that substance to be oxidized. ...
Chapter 13 Electrons in Atoms
... 5. The Dual Wave-Particle Nature of Light In 1905 Albert Einstein expanded on Planck’s theory by introducing the idea that electromagnetic radiation exhibits both wave properties and also particle properties. It can be thought of as a stream of particles. Each particle of light carries a quantum of ...
... 5. The Dual Wave-Particle Nature of Light In 1905 Albert Einstein expanded on Planck’s theory by introducing the idea that electromagnetic radiation exhibits both wave properties and also particle properties. It can be thought of as a stream of particles. Each particle of light carries a quantum of ...