Question 1

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

Question 2

Select the correct symbol for the element gold.

Accepted Answer

A) Go 
B) Hg 
C) Ag 
D) Au 
E) AU

Question 3

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

Accepted Answer

A) 2,8,9 
B) 2,8,7,2 
C) 2,10,7 
D) 2,8,8,1 
E) 2,8,6,3

Question 4

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

Question 5

Consider a neutral atom with 30 protons and 34 neutrons.The atomic number of the element is ________.

Accepted Answer

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

Question 6

Select the correct symbol for the element mercury.

Accepted Answer

A) Mr 
B) Na 
C) Au 
D) Hg 
E) Ag

Question 7

What elements are in hydroxyapatite,    OH,a major compound in human bones and teeth?

Accepted Answer

A) carbon,potassium,oxygen,hydrogen 
B) calcium,phosphorous,oxygen,hydrogen 
C) carbon,phosphorous,oxygen,helium 
D) calcium,phosphorous,oxygen,helium 
E) carbon,potassium,oxygen,helium

Question 8

The proton has a positive charge.

Accepted Answer

A) True 
 B)False

Question 9

According to the atomic theory,________.

Accepted Answer

A) all atoms are different 
B) atoms are neither created nor destroyed during a chemical reaction 
C) atoms of the same element combine to form compounds 
D) all matter is made up of tiny particles called electrons 
E) a compound can contain different numbers of atoms as long as it has the same kinds of atoms

Question 10

A sodium atom with a mass number of 23 has 23 neutrons.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following elements is a nonmetal?

Accepted Answer

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

Question 12

A calcium atom two electrons in the fourth energy level.

Accepted Answer

A) True 
 B)False

Question 13

The symbol for mercury is Mg.

Accepted Answer

A) True 
 B)False

Question 14

Radon is a metal.

Accepted Answer

A) True 
 B)False

Question 15

Atomic size decreases going from left to right within a period.

Accepted Answer

A) True 
 B)False

Question 16

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.

Question 17

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

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 18

Metallic character increases going down a group.

Accepted Answer

A) True 
 B)False

Question 19

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

Question 20

What is the electron arrangement for aluminum?

Accepted Answer

A) 2,8,3 
B) 2,8,5 
C) 2,8,7 
D) 2,8,8 
E) 2,8,10

Exam 4: Atoms and Elements

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

Select the correct symbol for the element gold.

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

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

Consider a neutral atom with 30 protons and 34 neutrons.The atomic number of the element is ________.

Select the correct symbol for the element mercury.

What elements are in hydroxyapatite, OH,a major compound in human bones and teeth?

The proton has a positive charge.

According to the atomic theory,________.

A sodium atom with a mass number of 23 has 23 neutrons.

Which of the following elements is a nonmetal?

A calcium atom two electrons in the fourth energy level.

The symbol for mercury is Mg.

Radon is a metal.

Atomic size decreases going from left to right within a period.

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

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

Metallic character increases going down a group.

The number of neutrons in an atom is equal to ________.

What is the electron arrangement for aluminum?