Question 1

Select the correct symbol for the element.
-silver

Accepted Answer

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

Question 2

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

Accepted Answer

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

Question 3

What is the mass number of an atom of potassium that has 20 neutrons?

Accepted Answer

A) 39 
B) 59 
C) 35 
D) 19 
E) 15 
A) 39 
B) 59 
C) 35 
D) 19 
E) 15 A

Question 4

Write in the electronic configuration for the atom shown.
-Magnesium

Accepted Answer

The answer of Write in the electronic configuration for the...

Question 5

What is the electron configuration for aluminum?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 6

Write in the electronic configuration for the atom shown.
-Phosphorus

Accepted Answer

The answer of Write in the electronic configuration for the...

Question 7

In an electron-dot structure of an element, the dots are used to represent

Accepted Answer

A) the electron arrangement. 
B) the electrons that the element will gain when it forms a compound. 
C) only the electrons that will participate in bond formation. 
D) all of the electrons in the atom. 
E) the valence electrons. 
A) the electron arrangement. 
B) the electrons that the element will gain when it forms a compound. 
C) only the electrons that will participate in bond formation. 
D) all of the electrons in the atom. 
E) the valence electrons.

Question 8

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 9

The atomic size of atoms

Accepted Answer

A) decreases going across a period. 
B) decreases going down within a group. 
C) does not change going across a period. 
D) increases going across a period. 
A) decreases going across a period. 
B) decreases going down within a group. 
C) does not change going across a period. 
D) increases going across a period.

Question 10

According to the Atomic Theory,

Accepted Answer

A) atoms are neither created nor destroyed during a chemical reaction. 
B) atoms of the same element combine to form compounds. 
C) all atoms are different. 
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. 
A) atoms are neither created nor destroyed during a chemical reaction. 
B) atoms of the same element combine to form compounds. 
C) all atoms are different. 
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 11

Which of the following elements is a nonmetal?

Accepted Answer

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

Question 12

Silicon has three naturally occurring isotopes: Si-28 (mass 28.0 amu); Si-29 (mass = 29.0 amu)and Si-30 (mass = 30.0 amu). If the average atomic mass of silicon is 28.1 amu, which isotope is the most abundant?

Accepted Answer

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

Question 13

What is the correct electron configuration for the lithium atom?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 14

Which of the following is a characteristic of nonmetals?

Accepted Answer

A) good conductors of heat 
B) shiny 
C) good conductors of electricity 
D) malleable 
E) low melting points 
A) good conductors of heat 
B) shiny 
C) good conductors of electricity 
D) malleable 
E) low melting points

Question 15

The number of electrons in the outer energy level of a neutral atom of boron (atomic number 5)is

Accepted Answer

A) 2. 
B) 3. 
C) 5. 
D) 8. 
E) 10. 
A) 2. 
B) 3. 
C) 5. 
D) 8. 
E) 10.

Question 16

Given the following:  Which are isotopes of each other?

Accepted Answer

A)    are isotopes of each other. 
B)    are isotopes of each other; and   are isotopes of each other. 
C)    are isotopes of each other. 
D)    are isotopes of each other. 
A)    are isotopes of each other. 
B)    are isotopes of each other; and   are isotopes of each other. 
C)    are isotopes of each other. 
D)    are isotopes of each other.

Question 17

The ionization energy of atoms

Accepted Answer

A) decreases going down within a group. 
B) increases going down within a group. 
C) does not change going down within a group. 
D) decreases going across a period. 
A) decreases going down within a group. 
B) increases going down within a group. 
C) does not change going down within a group. 
D) decreases going across a period.

Question 18

The number of orbitals in the 4d sublevel is

Accepted Answer

A) 1. 
B) 2. 
C) 3. 
D) 4. 
E) 5. 
A) 1. 
B) 2. 
C) 3. 
D) 4. 
E) 5.

Question 19

Which element would have physical and chemical properties similar to chlorine?

Accepted Answer

A) Ar 
B) O 
C) Br 
D) S 
E) P 
A) Ar 
B) O 
C) Br 
D) S 
E) P

Question 20

In an atom, the nucleus contains

Accepted Answer

A) only protons. 
B) only neutrons. 
C) all the protons and electrons. 
D) all the protons and neutrons. 
E) an equal number of protons and electrons. 
A) only protons. 
B) only neutrons. 
C) all the protons and electrons. 
D) all the protons and neutrons. 
E) an equal number of protons and electrons.

Exam 4: Atoms and Elements

Select the correct symbol for the element. -silver

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

What is the mass number of an atom of potassium that has 20 neutrons?

Write in the electronic configuration for the atom shown. -Magnesium

What is the electron configuration for aluminum?

Write in the electronic configuration for the atom shown. -Phosphorus

In an electron-dot structure of an element, the dots are used to represent

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

The atomic size of atoms

According to the Atomic Theory,

Which of the following elements is a nonmetal?

Silicon has three naturally occurring isotopes: Si-28 (mass 28.0 amu); Si-29 (mass = 29.0 amu)and Si-30 (mass = 30.0 amu). If the average atomic mass of silicon is 28.1 amu, which isotope is the most abundant?

What is the correct electron configuration for the lithium atom?

Which of the following is a characteristic of nonmetals?

The number of electrons in the outer energy level of a neutral atom of boron (atomic number 5)is

Given the following: Which are isotopes of each other?

The ionization energy of atoms

The number of orbitals in the 4d sublevel is

Which element would have physical and chemical properties similar to chlorine?

In an atom, the nucleus contains

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