Question 1

Which of the following is the correct electron-dot structure for carbon?

Accepted Answer

A)    
B)  $\cdot \dot { \mathrm { C } } :$ 
C)    
D)    
E)  $.\ddot { C } .$ 
A)    
B)  $\cdot \dot { \mathrm { C } } :$ 
C)    
D)    
E)  $.\ddot { C } .$

Question 2

An electron has a positive charge.

Accepted Answer

A) True 
 B)False

Question 3

The number of electron levels in a magnesium atom is

Accepted Answer

A)  1. 
B)  2. 
C)  3. 
D)  4. 
E)  5. 
A)  1. 
B)  2. 
C)  3. 
D)  4. 
E)  5.

Question 4

Give the correct number of electrons.
-in the highest occupied energy level of chlorine

Accepted Answer

A) one 
B) seven 
C) two 
D) eight 
E) five 
A) one 
B) seven 
C) two 
D) eight 
E) five

Question 5

The number of dots in the electron dot structure of nitrogen is

Accepted Answer

A)  one. 
B)  two. 
C)  three. 
D)  four. 
E)  five. 
A)  one. 
B)  two. 
C)  three. 
D)  four. 
E)  five.

Question 6

Which of the following gives the correct numbers of protons, neutrons, and electrons in a neutral atom of 118 
50 Sn?

Accepted Answer

A)  118 protons, 50 neutrons, 118 electrons 
B)  118 protons, 118 neutrons, 50 electrons 
C)  50 protons, 68 neutrons, 50 electrons 
D)  68 protons, 68 neutrons, 50 electrons 
E)  50 protons, 50 neutrons, 50 electrons 
A)  118 protons, 50 neutrons, 118 electrons 
B)  118 protons, 118 neutrons, 50 electrons 
C)  50 protons, 68 neutrons, 50 electrons 
D)  68 protons, 68 neutrons, 50 electrons 
E)  50 protons, 50 neutrons, 50 electrons

Question 7

Classify the following elements.
-phosphorus

Accepted Answer

A) noble gas 
B) alkali metal 
C) nonmetal 
D) alkaline earth metal 
E) transition element
F)halogen 
A) noble gas 
B) alkali metal 
C) nonmetal 
D) alkaline earth metal 
E) transition element
F)halogen

Question 8

Write in the electronic configuration for the atom shown.
-Sodium

Accepted Answer

The answer of Write in the electronic configuration for the...

Question 9

A lithium atom is larger than a potassium atom.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following elements is a nonmetal?

Accepted Answer

A)  nitrogen 
B)  sodium 
C)  iron 
D)  silver 
E)  calcium 
A)  nitrogen 
B)  sodium 
C)  iron 
D)  silver 
E)  calcium

Question 11

Isotopes are atoms of the same element that have

Accepted Answer

A)  different atomic numbers. 
B)  the same atomic numbers but different numbers of protons. 
C)  the same atomic numbers but different numbers of electrons. 
D)  the same atomic number but different numbers of neutrons. 
E)  the same atomic mass but different numbers of protons. 
A)  different atomic numbers. 
B)  the same atomic numbers but different numbers of protons. 
C)  the same atomic numbers but different numbers of electrons. 
D)  the same atomic number but different numbers of neutrons. 
E)  the same atomic mass but different numbers of protons.

Question 12

Ca is the symbol for

Accepted Answer

A)  calcium. 
B)  carbon. 
C)  cobalt. 
D)  copper. 
E)  cadmium. 
A)  calcium. 
B)  carbon. 
C)  cobalt. 
D)  copper. 
E)  cadmium.

Question 13

Which of the following descriptions of a subatomic particle is correct?

Accepted Answer

A)  A proton has a positive charge and a mass of approximately 1 amu. 
B)  An electron has a negative charge and a mass of approximately 1 amu. 
C)  A neutron has no charge and its mass is negligible. 
D)  A proton has a positive charge and a negligible mass. 
E)  A neutron has a positive charge and a mass of approximately 1 amu. 
A)  A proton has a positive charge and a mass of approximately 1 amu. 
B)  An electron has a negative charge and a mass of approximately 1 amu. 
C)  A neutron has no charge and its mass is negligible. 
D)  A proton has a positive charge and a negligible mass. 
E)  A neutron has a positive charge and a mass of approximately 1 amu.

Question 14

Write in the electronic configuration for the atom shown.
-Phosphorus

Accepted Answer

The answer of Write in the electronic configuration for the...

Question 15

The smallest particle of an element that retains the characteristics of the element is a(n)

Accepted Answer

A)  electron. 
B)  neutron. 
C)  proton. 
D)  atom. 
E)  nucleus. 
A)  electron. 
B)  neutron. 
C)  proton. 
D)  atom. 
E)  nucleus.

Question 16

A sample of silicon has three naturally occurring isotopes: Si-28 (mass 28.0 amu); Si-29 (mass 29.0 amu) and Si-30 (mass = 30.0 amu). If the average atomic mass of silicon is 28.1 amu, which isotope is the most abundant?

Accepted Answer

A)  Si-28 
B)  Si-29 
C)  Si-30 
D)  All isotopes have the same natural abundance. 
A)  Si-28 
B)  Si-29 
C)  Si-30 
D)  All isotopes have the same natural abundance.

Question 17

Which of the following elements is a metal?

Accepted Answer

A)  nitrogen 
B)  fluorine 
C)  argon 
D)  strontium 
E)  phosphorus 
A)  nitrogen 
B)  fluorine 
C)  argon 
D)  strontium 
E)  phosphorus

Question 18

Of the elements: B, C, F, Li, and Na. The element with the most metallic character is

Accepted Answer

A)  B. 
B)  C. 
C)  F. 
D)  Li. 
E)  Na. 
A)  B. 
B)  C. 
C)  F. 
D)  Li. 
E)  Na.

Question 19

Which of the following is a characteristic of the modern periodic table?

Accepted Answer

A)  A group is a horizontal row on the periodic table. 
B)  A period is a column on the periodic table. 
C)  The elements in each group have similar chemical properties. 
D)  The B groups contain the representative elements. 
E)  The A groups contain the transition elements. 
A)  A group is a horizontal row on the periodic table. 
B)  A period is a column on the periodic table. 
C)  The elements in each group have similar chemical properties. 
D)  The B groups contain the representative elements. 
E)  The A groups contain the transition elements.

Question 20

Au is the symbol for

Accepted Answer

A)  gold. 
B)  silver. 
C)  argon. 
D)  aluminum. 
E)  sodium. 
A)  gold. 
B)  silver. 
C)  argon. 
D)  aluminum. 
E)  sodium.

Exam 3: Atoms and Elements

Which of the following is the correct electron-dot structure for carbon?

An electron has a positive charge.

The number of electron levels in a magnesium atom is

Give the correct number of electrons. -in the highest occupied energy level of chlorine

The number of dots in the electron dot structure of nitrogen is

Which of the following gives the correct numbers of protons, neutrons, and electrons in a neutral atom of 118 50 Sn?

Classify the following elements. -phosphorus

Write in the electronic configuration for the atom shown. -Sodium

A lithium atom is larger than a potassium atom.

Which of the following elements is a nonmetal?

Isotopes are atoms of the same element that have

Ca is the symbol for

Which of the following descriptions of a subatomic particle is correct?

Write in the electronic configuration for the atom shown. -Phosphorus

The smallest particle of an element that retains the characteristics of the element is a(n)

A sample of silicon has three naturally occurring isotopes: Si-28 (mass 28.0 amu); Si-29 (mass 29.0 amu) and Si-30 (mass = 30.0 amu). If the average atomic mass of silicon is 28.1 amu, which isotope is the most abundant?

Which of the following elements is a metal?

Of the elements: B, C, F, Li, and Na. The element with the most metallic character is

Which of the following is a characteristic of the modern periodic table?

Au is the symbol for

Chemistry and Measurements

Energy and Matter

Nuclear Chemistry

Compounds and Their Bonds

Chemical Reactions and Quantities

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Reaction Rates and Chemical Equilibrium

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Introduction to Organic Chemistry: Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Phenols, Thiols, and Ethers

Aldehydes, Ketones, and Chiral Molecules

Carbohydrates

Carboxylic Acids and Esters

Lipids

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Nucleic Acids and Protein Synthesis

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