Question 1

Which statement describing atoms is false?

Accepted Answer

A) The number of protons in an atom is referred to as the atomic number of the atom. 
B) The total number of protons, neutrons, and electrons in an atom is referred to as the mass number of the atom. 
C) Protons and neutrons are located in the nucleus of an atom. 
D) Electrons are located in the space outside the nucleus called the electron cloud. 
A) The number of protons in an atom is referred to as the atomic number of the atom. 
B) The total number of protons, neutrons, and electrons in an atom is referred to as the mass number of the atom. 
C) Protons and neutrons are located in the nucleus of an atom. 
D) Electrons are located in the space outside the nucleus called the electron cloud. B

Question 2

Electrons are negatively charged and have the smallest mass of the three subatomic particles.

Accepted Answer

A) True 
 B)False  True

Question 3

Which element is a transition metal in period 4?

Accepted Answer

A) K 
B) Hf 
C) Sn 
D) Sc 
A) K 
B) Hf 
C) Sn 
D) Sc D

Question 4

What is the maximum number of electrons that can occupy the third (n=3)shell?

Accepted Answer

A) 2 
B) 3 
C) 6 
D) 8 
E) 18 
A) 2 
B) 3 
C) 6 
D) 8 
E) 18

Question 5

Zirconium (Zr)is an element classified as a metal. Which property cannot be assumed based on its classification as a metal?

Accepted Answer

A) Zr has a relatively high density 
B) Zr is a trace element in the body 
C) Zr is a good conductor of electricity 
D) Zr is a shiny solid 
A) Zr has a relatively high density 
B) Zr is a trace element in the body 
C) Zr is a good conductor of electricity 
D) Zr is a shiny solid

Question 6

Phosphorus has 15 valence electrons.

Accepted Answer

A) True 
 B)False

Question 7

Group 6A elements have the general electron configuration of ns2np6.

Accepted Answer

A) True 
 B)False

Question 8

The 5s orbital is lower in energy than the 4d orbital.

Accepted Answer

A) True 
 B)False

Question 9

How many protons are in the isotope with the symbol   ?

Accepted Answer

A) 17 
B) 18 
C) 35.45 
D) 37 
A) 17 
B) 18 
C) 35.45 
D) 37

Question 10

Which element is not an alkali metal?

Accepted Answer

A) Li 
B) Kr 
C) Rb 
D) Na 
E) All of the above elements are alkali metals. 
A) Li 
B) Kr 
C) Rb 
D) Na 
E) All of the above elements are alkali metals.

Question 11

Silicon has three naturally occurring isotopes: Si-28, Si-29 and Si-30. If the average atomic mass of silicon is 28.09, which isotope has the highest isotopic abundance?

Accepted Answer

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

Question 12

What is the mass number of the isotope with the symbol   ?

Accepted Answer

A) 17 
B) 18 
C) 35.45 
D) 37 
A) 17 
B) 18 
C) 35.45 
D) 37

Question 13

Which element is not an alkali metal?

Accepted Answer

A) Li 
B) K 
C) Rb 
D) H 
E) All of the above elements are alkali metals. 
A) Li 
B) K 
C) Rb 
D) H 
E) All of the above elements are alkali metals.

Question 14

Which atom has the largest atomic radius?

Accepted Answer

A) K 
B) Ga 
C) Br 
D) Rb 
A) K 
B) Ga 
C) Br 
D) Rb

Question 15

When two electrons occupy the same orbital they have paired spins-that is, the spins are opposite in direction.

Accepted Answer

A) True 
 B)False

Question 16

All metals are solids at room temperature.

Accepted Answer

A) True 
 B)False

Question 17

The electron configuration of aluminum using the noble gas notation is _____.

Accepted Answer

The answer of The electron configuration of aluminum using the...

Question 18

Which element is a metalloid?

Accepted Answer

A) B 
B) C 
C) Ar 
D) Al 
A) B 
B) C 
C) Ar 
D) Al

Question 19

Nonmetals have a shiny appearance, and they are generally poor conductors of heat and electricity.

Accepted Answer

A) True 
 B)False

Question 20

The chemical reactivity of an element is determined by which of the following?

Accepted Answer

A) the number of protons in an atom of the element 
B) the number of valence electrons in an atom of the element 
C) the number of neutrons in an atom of the element 
D) the number of protons and neutrons in an atom of the element 
A) the number of protons in an atom of the element 
B) the number of valence electrons in an atom of the element 
C) the number of neutrons in an atom of the element 
D) the number of protons and neutrons in an atom of the element

Exam 2: Atoms and the Periodic Table

Which statement describing atoms is false?

Electrons are negatively charged and have the smallest mass of the three subatomic particles.

Which element is a transition metal in period 4?

What is the maximum number of electrons that can occupy the third (n=3)shell?

Zirconium (Zr)is an element classified as a metal. Which property cannot be assumed based on its classification as a metal?

Phosphorus has 15 valence electrons.

Group 6A elements have the general electron configuration of ns2np6.

The 5s orbital is lower in energy than the 4d orbital.

How many protons are in the isotope with the symbol ?

Which element is not an alkali metal?

Silicon has three naturally occurring isotopes: Si-28, Si-29 and Si-30. If the average atomic mass of silicon is 28.09, which isotope has the highest isotopic abundance?

What is the mass number of the isotope with the symbol ?

Which element is not an alkali metal?

Which atom has the largest atomic radius?

When two electrons occupy the same orbital they have paired spins-that is, the spins are opposite in direction.

All metals are solids at room temperature.

The electron configuration of aluminum using the noble gas notation is _____.

Which element is a metalloid?

Nonmetals have a shiny appearance, and they are generally poor conductors of heat and electricity.

The chemical reactivity of an element is determined by which of the following?

Matter and Measurement

Ionic Compounds

Covalent Compounds

Chemical Reactions

Energy Changes, Reaction Rates, and Equilibrium

Gases, Liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Alkanes

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen, Halogen, or Sulfur

The Three-Dimensional Shape of Molecules

Aldehydes and Ketones

Carboxylic Acids, Esters, and Amides

Amines and Neurotransmitters

Lipids

Carbohydrates

Amino Acids, Proteins, and Enzymes

Nucleic Acids and Protein Synthesis

Digestion and the Conversion of Food Into Energy

Carbohydrate, Lipid, and Protein Metabolism

Filters

Group 6A elements have the general electron configuration of ns²np⁶.