Question 1

Select the correct symbol for the element
-silver

Accepted Answer

A)  S 
B)  Si 
C)  Ag 
D)  Au 
E)  AG 
A)  S 
B)  Si 
C)  Ag 
D)  Au 
E)  AG

Question 2

Consider a neutral atom with 30 protons and 34 neutrons. The number of electrons in this atom is

Accepted Answer

A)  30. 
B)  32. 
C)  34. 
D)  64. 
E)  94. 
A)  30. 
B)  32. 
C)  34. 
D)  64. 
E)  94.

Question 3

Of the elements: B, C, F, Li, and Na. The element with the least 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 4

Classify the following elements.
-sulfur

Accepted Answer

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

Question 5

The electron configuration of potassium is 1s22s22p63s1.

Accepted Answer

A) True 
 B)False

Question 6

What element has the electron configuration 1s22s22p63s23p2?

Accepted Answer

A)  carbon 
B)  oxygen 
C)  sulfur 
D)  iron 
E)  silicon 
A)  carbon 
B)  oxygen 
C)  sulfur 
D)  iron 
E)  silicon

Question 7

Select the correct symbol for the element
-potassium

Accepted Answer

A)  P 
B)  Po 
C)  Pt 
D)  K 
E)  Ko 
A)  P 
B)  Po 
C)  Pt 
D)  K 
E)  Ko

Question 8

What is the electron configuration for potassium (atomic number 19)?

Accepted Answer

A)  1s22s22p63s23p7 
B)  1s22s22p63s23p53d2 
C)  1s22s22p83s23p5 
D)  1s22s22p63s23p64s1 
E)  1s22s22p63s23p54s1 
A)  1s22s22p63s23p7 
B)  1s22s22p63s23p53d2 
C)  1s22s22p83s23p5 
D)  1s22s22p63s23p64s1 
E)  1s22s22p63s23p54s1

Question 9

Select the correct symbol for the element.
-aluminum

Accepted Answer

A)  Al 
B)  Am 
C)  Au 
D)  Sn 
E)  Ag 
A)  Al 
B)  Am 
C)  Au 
D)  Sn 
E)  Ag

Question 10

How many valence electrons are in the electron-dot structures for the elements in group 3A(13)?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  6 
A)  1 
B)  2 
C)  3 
D)  4 
E)  6

Question 11

Given the following: 41
19 X, 39
19 X, 41
20 X, and 39
18 X. Which are isotopes of each other?

Accepted Answer

A)  41
19 X and 41
20 X are isotopes of each other; and 39
19 X and 39
18 X are isotopes of each other. 
B)  41
19 X and 39
19 X are isotopes of each other. 
C)  41
19 X, 39
19 X, 41
20 X, and 39
18 X are isotopes of each other. 
D)  None are isotopes of each other. 
A)  41
19 X and 41
20 X are isotopes of each other; and 39
19 X and 39
18 X are isotopes of each other. 
B)  41
19 X and 39
19 X are isotopes of each other. 
C)  41
19 X, 39
19 X, 41
20 X, and 39
18 X are isotopes of each other. 
D)  None are isotopes of each other.

Question 12

Chlorine has a higher ionization energy than aluminum.

Accepted Answer

A) True 
 B)False

Question 13

Radon is a metal.

Accepted Answer

A) True 
 B)False

Question 14

Classify the following elements.
-chlorine

Accepted Answer

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

Question 15

What is the symbol of the element in Period 4 and Group 2?

Accepted Answer

A)  Be 
B)  Mg 
C)  Ca 
D)  C 
E)  Si 
A)  Be 
B)  Mg 
C)  Ca 
D)  C 
E)  Si

Question 16

Ionization energy increases going down a group.

Accepted Answer

A) True 
 B)False

Question 17

Chlorine has more metallic character than fluorine.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following elements is a noble gas?

Accepted Answer

A)  oxygen 
B)  chlorine 
C)  bromine 
D)  argon 
E)  nitrogen 
A)  oxygen 
B)  chlorine 
C)  bromine 
D)  argon 
E)  nitrogen

Question 19

The number of valence electrons found in an atom of a Group A element is equal to

Accepted Answer

A)  its atomic number. 
B)  its mass number. 
C)  its group number. 
D)  eight. 
E)  eight minus the group number. 
A)  its atomic number. 
B)  its mass number. 
C)  its group number. 
D)  eight. 
E)  eight minus the group number.

Question 20

What is the correct electron configuration for the lithium atom?

Accepted Answer

A)  1s3 
B)  2s1 
C)  1s12s2 
D)  1s22s1 
E)  1s22s5 
A)  1s3 
B)  2s1 
C)  1s12s2 
D)  1s22s1 
E)  1s22s5

Exam 3: Atoms and Elements

Select the correct symbol for the element -silver

Consider a neutral atom with 30 protons and 34 neutrons. The number of electrons in this atom is

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

Classify the following elements. -sulfur

The electron configuration of potassium is 1s22s22p63s1.

What element has the electron configuration 1s22s22p63s23p2?

Select the correct symbol for the element -potassium

What is the electron configuration for potassium (atomic number 19)?

Select the correct symbol for the element. -aluminum

How many valence electrons are in the electron-dot structures for the elements in group 3A(13)?

Given the following: 41 19 X, 39 19 X, 41 20 X, and 39 18 X. Which are isotopes of each other?

Chlorine has a higher ionization energy than aluminum.

Radon is a metal.

Classify the following elements. -chlorine

What is the symbol of the element in Period 4 and Group 2?

Ionization energy increases going down a group.

Chlorine has more metallic character than fluorine.

Which of the following elements is a noble gas?

The number of valence electrons found in an atom of a Group A element is equal to

What is the correct electron configuration for the lithium atom?

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

The electron configuration of potassium is 1s²2s²2p⁶3s¹.

What element has the electron configuration 1s²2s²2p⁶3s²3p²?