Question 1

The number of neutrons in an atom is equal to

Accepted Answer

A)  the atomic number. 
B)  the mass number. 
C)  the mass number + the atomic number. 
D)  the mass number - the atomic number. 
E)  the number of protons. 
A)  the atomic number. 
B)  the mass number. 
C)  the mass number + the atomic number. 
D)  the mass number - the atomic number. 
E)  the number of protons.

Question 2

Of the elements: B, C, F, Li, and Na. The element with the smallest ionization energy is

Accepted Answer

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

Question 3

The Group 8A(18) elements

Accepted Answer

A)  are unreactive and are rarely found in combination with other elements. 
B)  are good conductors of electricity. 
C)  melt at high temperatures. 
D)  are liquids at room temperature. 
E)  react vigorously with water. 
A)  are unreactive and are rarely found in combination with other elements. 
B)  are good conductors of electricity. 
C)  melt at high temperatures. 
D)  are liquids at room temperature. 
E)  react vigorously with water.

Question 4

How many protons are in an isotope of sodium with a mass number of 25?

Accepted Answer

A)  11 
B)  14 
C)  15 
D)  25 
E)  32 
A)  11 
B)  14 
C)  15 
D)  25 
E)  32

Question 5

The atomic size of atoms

Accepted Answer

A)  increases going across a period. 
B)  decreases going across a period. 
C)  decreases going down within a group. 
D)  does not change going across a period. 
E)  None of the above. 
A)  increases going across a period. 
B)  decreases going across a period. 
C)  decreases going down within a group. 
D)  does not change going across a period. 
E)  None of the above.

Question 6

Sulfur has 16 valence electrons.

Accepted Answer

A) True 
 B)False

Question 7

Classify the following elements.
-silicon

Accepted Answer

A) nonmetal 
B) metal 
C) metalloid 
A) nonmetal 
B) metal 
C) metalloid

Question 8

Give the correct number of electrons.
-cobalt

Accepted Answer

A) C 
B) Co 
C) Cu 
D) Cl 
E) Ca 
A) C 
B) Co 
C) Cu 
D) Cl 
E) Ca

Question 9

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

Accepted Answer

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

Question 10

Do the following represent elements in a group, a period, or neither?
-O, S, Se

Accepted Answer

A) period 
B) neither 
C) group 
A) period 
B) neither 
C) group

Question 11

The maximum number of electrons that may occupy the third energy level is

Accepted Answer

A)  2. 
B)  8. 
C)  10. 
D)  18. 
E)  32. 
A)  2. 
B)  8. 
C)  10. 
D)  18. 
E)  32.

Question 12

Of the elements: B, C, F, Li, and Na. The element with the highest ionization energy is

Accepted Answer

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

Question 13

What is the element with the electron configuration 1s22s22p63s23p5?

Accepted Answer

A)  Be 
B)  Cl 
C)  F 
D)  S 
E)  Ar 
A)  Be 
B)  Cl 
C)  F 
D)  S 
E)  Ar

Question 14

Give the correct number of electrons.
-in the second energy level of magnesium

Accepted Answer

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

Question 15

Classify the following elements.
-nickel

Accepted Answer

A) nonmetal 
B) metal 
C) metalloid 
A) nonmetal 
B) metal 
C) metalloid

Question 16

Protons and neutrons are located in the nucleus of an atom.

Accepted Answer

A) True 
 B)False

Question 17

Classify the following elements.
-bromine

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 18

The atomic number of an atom is equal to the number of

Accepted Answer

A)  nuclei. 
B)  neutrons. 
C)  neutrons plus protons. 
D)  electrons plus protons. 
E)  protons. 
A)  nuclei. 
B)  neutrons. 
C)  neutrons plus protons. 
D)  electrons plus protons. 
E)  protons.

Question 19

Classify the following elements.
-cobalt

Accepted Answer

A) nonmetal 
B) metal 
C) metalloid 
A) nonmetal 
B) metal 
C) metalloid

Question 20

Of the elements: B, C, F, Li, and Na, the element with the smallest atomic radius is

Accepted Answer

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

Exam 3: Atoms and Elements

The number of neutrons in an atom is equal to

Of the elements: B, C, F, Li, and Na. The element with the smallest ionization energy is

The Group 8A(18) elements

How many protons are in an isotope of sodium with a mass number of 25?

The atomic size of atoms

Sulfur has 16 valence electrons.

Classify the following elements. -silicon

Give the correct number of electrons. -cobalt

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

Do the following represent elements in a group, a period, or neither? -O, S, Se

The maximum number of electrons that may occupy the third energy level is

Of the elements: B, C, F, Li, and Na. The element with the highest ionization energy is

What is the element with the electron configuration 1s22s22p63s23p5?

Give the correct number of electrons. -in the second energy level of magnesium

Classify the following elements. -nickel

Protons and neutrons are located in the nucleus of an atom.

Classify the following elements. -bromine

The atomic number of an atom is equal to the number of

Classify the following elements. -cobalt

Of the elements: B, C, F, Li, and Na, the element with the smallest atomic radius is

Chemistry and Measurements

Energy and Matter

Nuclear Chemistry

Compounds and Their Bonds

Chemical Reactions and Quantities

Gases

Solutions

Reaction Rates and Chemical Equilibrium

Acids and Bases

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

Amines and Amides

Amino Acids and Proteins

Enzymes and Vitamins

Nucleic Acids and Protein Synthesis

Metabolic Pathways for Carbohydrates

Metabolism and Energy Production

Metabolic Pathways for Lipids and Amino Acids

Filters

What is the element with the electron configuration 1s²2s²2p⁶3s²3p⁵?