Question 1

Rutherford's experiment,in which alpha particles were aimed at a thin piece of gold,led to what understanding?

Accepted Answer

A) Neutrons existed. 
B) Electrons existed and have a negative charge. 
C) The number of electrons can be determined by the mass number and atomic number. 
D) Electrons can be promoted to higher energy by absorbing energy. 
E) An atom is mostly empty space. 
A) Neutrons existed. 
B) Electrons existed and have a negative charge. 
C) The number of electrons can be determined by the mass number and atomic number. 
D) Electrons can be promoted to higher energy by absorbing energy. 
E) An atom is mostly empty space.

Question 2

There are eight valence electrons in a chlorine anion.

Accepted Answer

A) True 
 B)False

Question 3

Electron affinity is

Accepted Answer

A) the energy required to remove an electron from an isolated atom. 
B) the force between two electrons in the same orbital. 
C) the force between two ions of opposite charge. 
D) the energy released when an isolated atom gains an electron. 
E) the attraction of an atom for an electron in a chemical bond. 
A) the energy required to remove an electron from an isolated atom. 
B) the force between two electrons in the same orbital. 
C) the force between two ions of opposite charge. 
D) the energy released when an isolated atom gains an electron. 
E) the attraction of an atom for an electron in a chemical bond.

Question 4

In modern atomic theory,Bohr's orbits are replaced by atomic orbitals.What is an atomic orbital?

Accepted Answer

A) a circular path around the nucleus travelled by an electron 
B) a dense,positively charged region of space at the center of an atom 
C) a region of space within an atom where there is a high probability of finding an electron 
D) the outermost principle energy level in an atom 
E) the lowest energy arrangement of electrons in an atom 
A) a circular path around the nucleus travelled by an electron 
B) a dense,positively charged region of space at the center of an atom 
C) a region of space within an atom where there is a high probability of finding an electron 
D) the outermost principle energy level in an atom 
E) the lowest energy arrangement of electrons in an atom

Question 5

What is the lowest energy sublevel of a principal level?

Accepted Answer

A) d 
B) e 
C) f 
D) s 
E) p 
A) d 
B) e 
C) f 
D) s 
E) p

Question 6

Bohr was the first to use the term "orbit" to explain the fixed energy levels of electrons.

Accepted Answer

A) True 
 B)False

Question 7

Why do atoms gain and lose electrons to have eight electrons in the valence shell?

Accepted Answer

A) Atoms/ions are stable when the n=2 principal level is full. 
B) Atoms/ions are stable when the s and p sublevels of the valence shell are full. 
C) Atoms/ions are stable when the d sublevel of the valence shell is full. 
D) Atoms/ions are stable when the n=4 principal level is full. 
E) Atoms/ions are stable when the s,p,and d sublevels of the 2nd level are full. 
A) Atoms/ions are stable when the n=2 principal level is full. 
B) Atoms/ions are stable when the s and p sublevels of the valence shell are full. 
C) Atoms/ions are stable when the d sublevel of the valence shell is full. 
D) Atoms/ions are stable when the n=4 principal level is full. 
E) Atoms/ions are stable when the s,p,and d sublevels of the 2nd level are full.

Question 8

Which of the following elements is a metalloid?

Accepted Answer

A) C 
B) Ge 
C) Pb 
D) N 
E) P 
A) C 
B) Ge 
C) Pb 
D) N 
E) P

Question 9

The ions formed from Group IIA (2)atoms have charges of 2-.

Accepted Answer

A) True 
 B)False

Question 10

When is an atom in its ground state?

Accepted Answer

A) when the electrons of the atom are in the lowest possible energy levels 
B) when an atom loses all of its electrons to form a noble gas 
C) when the electrons of the atom are in the highest possible energy levels 
D) when an electron is promoted to a higher energy level,farther from the nucleus 
E) when the electrons of an atom spontaneously emit energy in the form of a photon 
A) when the electrons of the atom are in the lowest possible energy levels 
B) when an atom loses all of its electrons to form a noble gas 
C) when the electrons of the atom are in the highest possible energy levels 
D) when an electron is promoted to a higher energy level,farther from the nucleus 
E) when the electrons of an atom spontaneously emit energy in the form of a photon

Question 11

There are nine periods on the periodic table.

Accepted Answer

A) True 
 B)False

Question 12

The modern periodic table is arranged according to what property?

Accepted Answer

A) atomic number 
B) mass number 
C) atomic mass 
D) neutron number 
E) density 
A) atomic number 
B) mass number 
C) atomic mass 
D) neutron number 
E) density

Question 13

What is the general name given to the elements of Group IA (1)?

Accepted Answer

A) halogens 
B) alkali metals 
C) alkaline earth metals 
D) noble gases 
E) metalloids 
A) halogens 
B) alkali metals 
C) alkaline earth metals 
D) noble gases 
E) metalloids

Question 14

Which sublevel has the lowest energy?

Accepted Answer

A) 2s 
B) 3p 
C) 4p 
D) 4s 
E) 2p 
A) 2s 
B) 3p 
C) 4p 
D) 4s 
E) 2p

Question 15

What is the energy required to remove an electron from an isolated atom?

Accepted Answer

A) electron affinity 
B) electronegativity 
C) ionization energy 
D) kinetic energy 
E) potential energy 
A) electron affinity 
B) electronegativity 
C) ionization energy 
D) kinetic energy 
E) potential energy

Question 16

How many valence electrons are in an atom of carbon?

Accepted Answer

A) 8 
B) 6 
C) 4 
D) 1 
E) 0 
A) 8 
B) 6 
C) 4 
D) 1 
E) 0

Question 17

Which two scientists in 1869 arranged the elements in order of increasing atomic masses to form a precursor of the modern periodic table of elements?

Accepted Answer

A) Bohr and Rutherford 
B) Plank and Rutherford 
C) Maxwell and Dalton 
D) Thomson and Crookes 
E) Mendeleev and Meyer 
A) Bohr and Rutherford 
B) Plank and Rutherford 
C) Maxwell and Dalton 
D) Thomson and Crookes 
E) Mendeleev and Meyer

Question 18

Which period contains the element sodium?

Accepted Answer

A) one 
B) two 
C) three 
D) five 
E) eleven 
A) one 
B) two 
C) three 
D) five 
E) eleven

Question 19

Which of the following is a metal in the third period?

Accepted Answer

A) Ge 
B) Cl 
C) Ca 
D) Mg 
E) Cu 
A) Ge 
B) Cl 
C) Ca 
D) Mg 
E) Cu

Question 20

What is FALSE about the three orbitals in the 2p sublevel?

Accepted Answer

A) The orbitals have the same dumbbell-like shape. 
B) The orbitals have similar,but different energies. 
C) The orbitals are the same distance away from the nucleus. 
D) The orbitals are each oriented in a different direction. 
E) Each orbital can hold two electrons with opposite spins. 
A) The orbitals have the same dumbbell-like shape. 
B) The orbitals have similar,but different energies. 
C) The orbitals are the same distance away from the nucleus. 
D) The orbitals are each oriented in a different direction. 
E) Each orbital can hold two electrons with opposite spins.

Exam 2: The Structure of the Atom and the Periodic Table

Rutherford's experiment,in which alpha particles were aimed at a thin piece of gold,led to what understanding?

There are eight valence electrons in a chlorine anion.

Electron affinity is

In modern atomic theory,Bohr's orbits are replaced by atomic orbitals.What is an atomic orbital?

What is the lowest energy sublevel of a principal level?

Bohr was the first to use the term "orbit" to explain the fixed energy levels of electrons.

Why do atoms gain and lose electrons to have eight electrons in the valence shell?

Which of the following elements is a metalloid?

The ions formed from Group IIA (2)atoms have charges of 2-.

When is an atom in its ground state?

There are nine periods on the periodic table.

The modern periodic table is arranged according to what property?

What is the general name given to the elements of Group IA (1)?

Which sublevel has the lowest energy?

What is the energy required to remove an electron from an isolated atom?

How many valence electrons are in an atom of carbon?

Which two scientists in 1869 arranged the elements in order of increasing atomic masses to form a precursor of the modern periodic table of elements?

Which period contains the element sodium?

Which of the following is a metal in the third period?

What is FALSE about the three orbitals in the 2p sublevel?

Chemistry - Methods and Measurement

Structure and Properties of Ionic and Covalent Compounds

Calculations, chemical Changes, and the Chemical Equation

States of Matter: Gases, liquids, and Solids

Solutions

Energy,rate and Equilibrium

Acids and Bases

The Nucleus, radioactivity, and Nuclear Medicine

An Introduction to Organic Chemistry

The Unsaturated Hydrocarbons: Alkenes, alkynes, and Aromatics

Alcohols, phenols, thiols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Lipids and Their Functions in Biochemical Systems

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Aerobic Respiration and Energy Production

Fatty Acid Metabolism

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