Question 1

How many electrons are in the 4p orbitals of selenium?

Accepted Answer

A) 0 
B) 2 
C) 4 
D) 5 
E) 6 
A) 0 
B) 2 
C) 4 
D) 5 
E) 6 C

Question 2

How does atomic radius change as you move across the periodic table?

Accepted Answer

A) Atomic radius decreases moving from left to right across a period and increases from top to bottom. 
B) Atomic radius increases moving left to right across a period and decreases from top to bottom. 
C) Smaller nuclear charge lowers energy; more electrons in an orbital lowers energy. 
D) Atomic radius increases diagonally across the periodic table. 
E) None of the answers is correct. 
A) Atomic radius decreases moving from left to right across a period and increases from top to bottom. 
B) Atomic radius increases moving left to right across a period and decreases from top to bottom. 
C) Smaller nuclear charge lowers energy; more electrons in an orbital lowers energy. 
D) Atomic radius increases diagonally across the periodic table. 
E) None of the answers is correct. A

Question 3

Consider the element with the electron configuration [Kr]5s24d7.This element is

Accepted Answer

A) a halogen. 
B) a transition metal. 
C) a nonmetal. 
D) an actinide element. 
E) a noble gas. 
A) a halogen. 
B) a transition metal. 
C) a nonmetal. 
D) an actinide element. 
E) a noble gas. B

Question 4

An aluminum ion, Al3+, has

Accepted Answer

A) 13 protons and 13 electrons. 
B) 27 protons and 24 electrons. 
C) 16 protons and 13 electrons. 
D) 13 protons and 10 electrons. 
E) 10 protons and 13 electrons. 
A) 13 protons and 13 electrons. 
B) 27 protons and 24 electrons. 
C) 16 protons and 13 electrons. 
D) 13 protons and 10 electrons. 
E) 10 protons and 13 electrons.

Question 5

How many orbitals can have the 3p description in a given atom?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 5 
A) 1 
B) 2 
C) 3 
D) 5

Question 6

Which of these elements has the greatest metallic character?

Accepted Answer

A) Br 
B) Se 
C) Ni 
D) As 
E) Si 
A) Br 
B) Se 
C) Ni 
D) As 
E) Si

Question 7

Using the periodic table, predict the charge on the common ion of selenium.

Accepted Answer

A) +1 
B) +2 
C) −1 
D) −2 
A) +1 
B) +2 
C) −1 
D) −2

Question 8

A magnesium ion, Mg2+, has

Accepted Answer

A) 12 protons and 13 electrons. 
B) 24 protons and 26 electrons. 
C) 12 protons and 10 electrons. 
D) 24 protons and 22 electrons. 
E) 12 protons and 14 electrons. 
A) 12 protons and 13 electrons. 
B) 24 protons and 26 electrons. 
C) 12 protons and 10 electrons. 
D) 24 protons and 22 electrons. 
E) 12 protons and 14 electrons.

Question 9

Which one of these ions has the smallest radius?

Accepted Answer

A) Cl− 
B) K+ 
C) S2− 
D) Na+ 
E) O2− 
A) Cl− 
B) K+ 
C) S2− 
D) Na+ 
E) O2−

Question 10

A sulfide ion, S2-, has

Accepted Answer

A) 16 protons and 16 electrons. 
B) 32 protons and 16 electrons. 
C) 16 protons and 14 electrons. 
D) 16 protons and 18 electrons. 
E) 32 protons and 18 electrons. 
A) 16 protons and 16 electrons. 
B) 32 protons and 16 electrons. 
C) 16 protons and 14 electrons. 
D) 16 protons and 18 electrons. 
E) 32 protons and 18 electrons.

Question 11

How many orbitals are there in the n = 4 level of the H-atom?

Accepted Answer

A) 4 
B) 6 
C) 8 
D) 16 
E) 18 
A) 4 
B) 6 
C) 8 
D) 16 
E) 18

Question 12

An element with the electron configuration [noble gas]ns2(n − 1)d8 has ___________ valence electrons.

Accepted Answer

A) 2 
B) 6 
C) 8 
D) 10 
E) None of these choices is correct. 
A) 2 
B) 6 
C) 8 
D) 10 
E) None of these choices is correct.

Question 13

How many dots does the Lewis dot symbol for argon have around it?

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 6 
E) 8 
A) 1 
B) 2 
C) 4 
D) 6 
E) 8

Question 14

Which of the following electron transitions would be expected to emit any light in the Bohr model of the atom?

Accepted Answer

A) n = 1 to n = 4 
B) n = 3 to n = 1 
C) n = 2 to n = 3 
D) n = 5 to n = 7 
A) n = 1 to n = 4 
B) n = 3 to n = 1 
C) n = 2 to n = 3 
D) n = 5 to n = 7

Question 15

How many dots does the Lewis dot symbol for carbon have around it?

Accepted Answer

A) 4 
B) 2 
C) 6 
D) 3 
E) 7 
A) 4 
B) 2 
C) 6 
D) 3 
E) 7

Question 16

Select the element that will lose an electron most easily, based on the periodic trend.

Accepted Answer

A) Na 
B) Mg 
C) Ar 
D) P 
A) Na 
B) Mg 
C) Ar 
D) P

Question 17

Which element has the following ground-state electron configuration? [Kr]5s24d105p3

Accepted Answer

A) Sn 
B) Sb 
C) Pb 
D) Bi 
E) Te 
A) Sn 
B) Sb 
C) Pb 
D) Bi 
E) Te

Question 18

The electron configuration of a ground-state Co atom is

Accepted Answer

A) [Ar]4s23d7 
B) 1s22s22p63s23d9 
C) [Ne]3s23d7 
D) [Ar]4s13d5 
E) [Ar]4s24d7 
A) [Ar]4s23d7 
B) 1s22s22p63s23d9 
C) [Ne]3s23d7 
D) [Ar]4s13d5 
E) [Ar]4s24d7

Question 19

Which of the following elements has the largest number of unpaired electrons in the ground state?

Accepted Answer

A) K 
B) V 
C) S 
D) Si 
E) Cl 
A) K 
B) V 
C) S 
D) Si 
E) Cl

Question 20

What element is represented by the electron configuration 1s22s22p63s23p64s23d104p65s14d10?

Accepted Answer

A) Ag 
B) Rb 
C) Cd 
D) Sr 
E) Cu 
A) Ag 
B) Rb 
C) Cd 
D) Sr 
E) Cu

How many electrons are in the 4p orbitals of selenium?

How does atomic radius change as you move across the periodic table?

Consider the element with the electron configuration [Kr]5s²4d⁷.This element is

An aluminum ion, Al³⁺, has

How many orbitals can have the 3p description in a given atom?

Which of these elements has the greatest metallic character?

Using the periodic table, predict the charge on the common ion of selenium.

A magnesium ion, Mg²⁺, has

Which one of these ions has the smallest radius?

A sulfide ion, S^2-, has

How many orbitals are there in the n = 4 level of the H-atom?

An element with the electron configuration [noble gas]ns²(n − 1)d⁸ has ___________ valence electrons.

How many dots does the Lewis dot symbol for argon have around it?

Which of the following electron transitions would be expected to emit any light in the Bohr model of the atom?

How many dots does the Lewis dot symbol for carbon have around it?

Select the element that will lose an electron most easily, based on the periodic trend.

Which element has the following ground-state electron configuration? [Kr]5s²4d¹⁰5p³

The electron configuration of a ground-state Co atom is

Which of the following elements has the largest number of unpaired electrons in the ground state?

What element is represented by the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹4d¹⁰?

Atoms and Elements

Compounds and Chemical Bonds

How Chemists Use Numbers

The Mole and Chemical Formulas

Molecular Shape

Solids, Liquids, and Phase Changes

Gases

Physical Properties of Solutions

Chemical Reactions and Chemical Equations

Using Balanced Chemical Equations

Acids and Bases

Equilibrium

Organic Chemistry

Biochemistry

Nuclear Chemistry

Electrochemistry

Filters

Exam 2: Electrons and the Periodic Table

How many electrons are in the 4p orbitals of selenium?

How does atomic radius change as you move across the periodic table?

Consider the element with the electron configuration [Kr]5s24d7.This element is

An aluminum ion, Al3+, has

How many orbitals can have the 3p description in a given atom?

Which of these elements has the greatest metallic character?

Using the periodic table, predict the charge on the common ion of selenium.

A magnesium ion, Mg2+, has

Which one of these ions has the smallest radius?

A sulfide ion, S2-, has

How many orbitals are there in the n = 4 level of the H-atom?

An element with the electron configuration [noble gas]ns2(n − 1)d8 has ___________ valence electrons.

How many dots does the Lewis dot symbol for argon have around it?

Which of the following electron transitions would be expected to emit any light in the Bohr model of the atom?

How many dots does the Lewis dot symbol for carbon have around it?

Select the element that will lose an electron most easily, based on the periodic trend.

Which element has the following ground-state electron configuration? [Kr]5s24d105p3

The electron configuration of a ground-state Co atom is

Which of the following elements has the largest number of unpaired electrons in the ground state?

What element is represented by the electron configuration 1s22s22p63s23p64s23d104p65s14d10?

Atoms and Elements

Compounds and Chemical Bonds

How Chemists Use Numbers

The Mole and Chemical Formulas

Molecular Shape

Solids, Liquids, and Phase Changes

Gases

Physical Properties of Solutions

Chemical Reactions and Chemical Equations

Using Balanced Chemical Equations

Acids and Bases

Equilibrium

Organic Chemistry

Biochemistry

Nuclear Chemistry

Electrochemistry

Filters

Consider the element with the electron configuration [Kr]5s²4d⁷.This element is

An aluminum ion, Al³⁺, has

A magnesium ion, Mg²⁺, has

A sulfide ion, S^2-, has

An element with the electron configuration [noble gas]ns²(n − 1)d⁸ has ___________ valence electrons.

Which element has the following ground-state electron configuration? [Kr]5s²4d¹⁰5p³

What element is represented by the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹4d¹⁰?