Subject Area Assessment Guides
... metals (Group 1), such as sodium and potassium, which are soft and white and extremely reactive chemically. Alkaline earth metals (Group 2), such as magnesium and calcium, are found in the second column of the periodic table. The transition metals (Groups 3 through 12) are represented by some of the ...
... metals (Group 1), such as sodium and potassium, which are soft and white and extremely reactive chemically. Alkaline earth metals (Group 2), such as magnesium and calcium, are found in the second column of the periodic table. The transition metals (Groups 3 through 12) are represented by some of the ...
2015 Academic Challenge CHEMISTRY TEST – STATE
... 23. Which of the following is a correct statement of Hund’s Rule? A. No two electrons may share the same set of quantum numbers. B. The location and the momentum of an electron cannot be known simultaneously. C. Electrons will occupy separate degenerate orbitals and maintain parallel spins before pa ...
... 23. Which of the following is a correct statement of Hund’s Rule? A. No two electrons may share the same set of quantum numbers. B. The location and the momentum of an electron cannot be known simultaneously. C. Electrons will occupy separate degenerate orbitals and maintain parallel spins before pa ...
Photoshop Atom Rubric - Technology in Science
... Anticipatory Set: Previously we discussed the location of the subatomic particles. Where are protons and neutrons located? (Students should say in the nucleus in the center of the atom) Where are electrons located? (Students should say outside the nucleus) Do you know how the electrons are arranged ...
... Anticipatory Set: Previously we discussed the location of the subatomic particles. Where are protons and neutrons located? (Students should say in the nucleus in the center of the atom) Where are electrons located? (Students should say outside the nucleus) Do you know how the electrons are arranged ...
Chapter 2
... of subatomic particles • An atom before interacting with other atoms is electrically neutral, i.e. in this atom: the # of protons = the # of electrons • An element’s atomic number is the number of protons in its nucleus. Therefore, Atomic number = # of protons = # of electrons Copyright © 2008 Pears ...
... of subatomic particles • An atom before interacting with other atoms is electrically neutral, i.e. in this atom: the # of protons = the # of electrons • An element’s atomic number is the number of protons in its nucleus. Therefore, Atomic number = # of protons = # of electrons Copyright © 2008 Pears ...
Early Atomic History
... able to predict the density, atomic mass, melting or boiling points and formulas of compounds for several “missing” elements. ...
... able to predict the density, atomic mass, melting or boiling points and formulas of compounds for several “missing” elements. ...
Ionic Equations
... If product is a gas that has a low solubility in water, reaction in solution is driven to produce the gas Tums relief Any carbonate with an acid NaHCO3(s) + HCl(aq) = NaCl(aq) + H2O(l) + CO2(g) ...
... If product is a gas that has a low solubility in water, reaction in solution is driven to produce the gas Tums relief Any carbonate with an acid NaHCO3(s) + HCl(aq) = NaCl(aq) + H2O(l) + CO2(g) ...
Ch. 4 Modern Chem Electrons
... The Quantum Model Magnetic Quantum Number (m): indicates the orientation of an orbital around the nucleus. Values, including zero, are –l to +l l = 0 = s orbital has only one orientation (sphere) l = 1 = p has three orientations l = 2 = d has five orientations l = 3 = f has seven orientations ...
... The Quantum Model Magnetic Quantum Number (m): indicates the orientation of an orbital around the nucleus. Values, including zero, are –l to +l l = 0 = s orbital has only one orientation (sphere) l = 1 = p has three orientations l = 2 = d has five orientations l = 3 = f has seven orientations ...
Name
... Page 8 89. The maximum number of electrons which can be placed in the M shell or orbital of electrons is _______. 90. The maximum number of electrons which can be placed in the N shell or orbital of electrons is _______. 91. The last or outer most shell of electrons in an atom is called the _______ ...
... Page 8 89. The maximum number of electrons which can be placed in the M shell or orbital of electrons is _______. 90. The maximum number of electrons which can be placed in the N shell or orbital of electrons is _______. 91. The last or outer most shell of electrons in an atom is called the _______ ...
Atomic Structure and Periodicity
... energy in the form of light continuously (like white light) because it is continually accelerating in a curved path Resulting loss of energy implies that the electron would necessarily have to move close to the nucleus due to loss of potential energy ...
... energy in the form of light continuously (like white light) because it is continually accelerating in a curved path Resulting loss of energy implies that the electron would necessarily have to move close to the nucleus due to loss of potential energy ...
syllabus details - hrsbstaff.ednet.ns.ca
... Explanations are only required for the first 20 elements, although general principles can extend to the whole of the periodic table. For example, students should know or be able to predict that K is in group I is using Z = 19, but need only know that since Cs is in group I, it has one electron in it ...
... Explanations are only required for the first 20 elements, although general principles can extend to the whole of the periodic table. For example, students should know or be able to predict that K is in group I is using Z = 19, but need only know that since Cs is in group I, it has one electron in it ...
Chapter 21 Chemistry of the Main
... Laboratory preparation of oxygen is the catalytic decomposition of KClO3 in the presence of MnO2: 2KClO3(s) 2KCl(s) + 3O2(g). Atmospheric oxygen is replenished by photosynthesis (process in plants where CO2 is converted to O2 in the presence of sunlight). ...
... Laboratory preparation of oxygen is the catalytic decomposition of KClO3 in the presence of MnO2: 2KClO3(s) 2KCl(s) + 3O2(g). Atmospheric oxygen is replenished by photosynthesis (process in plants where CO2 is converted to O2 in the presence of sunlight). ...
exo and endo experiments
... The Law of Conservation of Mass The Law of Conservation of Mass was officially established in the year 1789 by the French Chemist, Antoine Lavoisier. The Law of Conservation of Mass states that mass is neither lost nor gained in chemical reactions, it states that it simply changes form. For that rea ...
... The Law of Conservation of Mass The Law of Conservation of Mass was officially established in the year 1789 by the French Chemist, Antoine Lavoisier. The Law of Conservation of Mass states that mass is neither lost nor gained in chemical reactions, it states that it simply changes form. For that rea ...
File
... discovering the existence of neutrons, neutral particles in the nucleus which accounts for the remainder of an atom’s mass. ...
... discovering the existence of neutrons, neutral particles in the nucleus which accounts for the remainder of an atom’s mass. ...
Chapter 2
... Atomic Number and Atomic Mass • Atoms of the various elements differ in number of subatomic particles • An element’s atomic number is the number of protons in its nucleus • An element’s mass number is the sum of protons plus neutrons in the nucleus • Atomic mass, the atom’s total mass, can be appro ...
... Atomic Number and Atomic Mass • Atoms of the various elements differ in number of subatomic particles • An element’s atomic number is the number of protons in its nucleus • An element’s mass number is the sum of protons plus neutrons in the nucleus • Atomic mass, the atom’s total mass, can be appro ...
elements of chemistry unit
... One type of chemical reaction involves the transfer of electrons from one species (species means atoms or groups of atoms) to another. These reactions are called oxidation reduction reactions. The species that loses electrons is oxidized and the species gaining electrons is reduced. Oxidation reduct ...
... One type of chemical reaction involves the transfer of electrons from one species (species means atoms or groups of atoms) to another. These reactions are called oxidation reduction reactions. The species that loses electrons is oxidized and the species gaining electrons is reduced. Oxidation reduct ...
Atomic Theory Quiz A
... That’s the most common isotope, Sr-88. Watch your rounding to the nearest whole number work. 6. Name all seven metalloids and write their symbols next to their names (size order, small to large) Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As), Antimony (Sb), Tellurium (Te), and Astatine (At). ...
... That’s the most common isotope, Sr-88. Watch your rounding to the nearest whole number work. 6. Name all seven metalloids and write their symbols next to their names (size order, small to large) Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As), Antimony (Sb), Tellurium (Te), and Astatine (At). ...
© NCERT not to be republished
... treated with KCl, orange crystals of compound (D) crystallise out. Identify A to D and also explain the reactions. 66. When an oxide of manganese (A) is fused with KOH in the presence of an oxidising agent and dissolved in water, it gives a dark green solution of compound (B). Compound (B) dispropor ...
... treated with KCl, orange crystals of compound (D) crystallise out. Identify A to D and also explain the reactions. 66. When an oxide of manganese (A) is fused with KOH in the presence of an oxidising agent and dissolved in water, it gives a dark green solution of compound (B). Compound (B) dispropor ...
activity series
... 3. the moles (coefficients) of each substance used and each substance produced. ...
... 3. the moles (coefficients) of each substance used and each substance produced. ...
RES8_chemcontentchecklist
... State that alkanes and cycloalkanes are saturated hydrocarbons. State and explain the tetrahedral shape around each carbon atom in alkanes. Explain in terms of van der Waals’ forces the variations in the boiling points of alkanes with different carbon-chain length and branching. Describe the combus ...
... State that alkanes and cycloalkanes are saturated hydrocarbons. State and explain the tetrahedral shape around each carbon atom in alkanes. Explain in terms of van der Waals’ forces the variations in the boiling points of alkanes with different carbon-chain length and branching. Describe the combus ...
Terms Used in Part 3
... Atomic number: the number of protons in the nucleus of an atom. This number identifies the atom. Atomic mass: the average mass number of all isotopes of an atom. Round this number to find the mass number of the atom. Isotope: Atom with the same number of protons but a different number of neutrons an ...
... Atomic number: the number of protons in the nucleus of an atom. This number identifies the atom. Atomic mass: the average mass number of all isotopes of an atom. Round this number to find the mass number of the atom. Isotope: Atom with the same number of protons but a different number of neutrons an ...
Module 2 Overview
... greater than the mass of their protons. Rutherford proposed that there could be a particle with mass but no charge. He called it a neutron, and imagined it as a paired proton and electron. There was no evidence for any of these ideas, so scientists continued to study atoms. Chadwick repeated radiati ...
... greater than the mass of their protons. Rutherford proposed that there could be a particle with mass but no charge. He called it a neutron, and imagined it as a paired proton and electron. There was no evidence for any of these ideas, so scientists continued to study atoms. Chadwick repeated radiati ...