Question 1

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. 
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. B

Question 2

Which of the following is a characteristic of nonmetals?

Accepted Answer

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

Question 3

A sodium atom is larger than a silicon atom.

Accepted Answer

A) True 
 B)False  True

Question 4

silver

Accepted Answer

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

Question 5

What is the electron configuration for aluminum?

Accepted Answer

A) 1s22s22p63s23p1 
B) 1s22s22p63s23p3 
C) 1s22s22p63s23p5 
D) 1s22s22p63s23p6 
E) 1s22s22p63s23p8 
A) 1s22s22p63s23p1 
B) 1s22s22p63s23p3 
C) 1s22s22p63s23p5 
D) 1s22s22p63s23p6 
E) 1s22s22p63s23p8

Question 6

Of the elements: B, C, F, Li, and Na. The element with the highest ionization energy is

Accepted Answer

A) B. 
B) C. 
C) F. 
D) Li. 
E) Na. 
A) B. 
B) C. 
C) F. 
D) Li. 
E) Na.

Question 7

Consider an isotope of sodium with a mass number of 25. The number of neutrons in this isotope of sodium is

Accepted Answer

A) 11. 
B) 14. 
C) 16. 
D) 25. 
E) 32. 
A) 11. 
B) 14. 
C) 16. 
D) 25. 
E) 32.

Question 8

Identify the metalloid in the following list.

Accepted Answer

A) sulfur 
B) fluorine 
C) silver 
D) copper 
E) germanium 
A) sulfur 
B) fluorine 
C) silver 
D) copper 
E) germanium

Question 9

The Group 8A(18) elements

Accepted Answer

A) are unreactive and are rarely found in combination with other elements. 
B) are good conductors of electricity. 
C) melt at high temperatures. 
D) are liquids at room temperature. 
E) react vigorously with water. 
A) are unreactive and are rarely found in combination with other elements. 
B) are good conductors of electricity. 
C) melt at high temperatures. 
D) are liquids at room temperature. 
E) react vigorously with water.

Question 10

The elements sodium, magnesium, and silicon

Accepted Answer

A) are isotopes of each other. 
B) are in the same period of elements. 
C) have the same number of neutrons. 
D) are in the same group. 
E) have the same mass number. 
A) are isotopes of each other. 
B) are in the same period of elements. 
C) have the same number of neutrons. 
D) are in the same group. 
E) have the same mass number.

Question 11

A sample of chlorine has two naturally occurring isotopes. The isotope Cl-35 (mass 35.0 amu) makes up 75.8% of the sample, and the isotope Cl-37 (mass = 37.0 amu) makes up 24.3% of the sample. What is the average atomic mass for chlorine?

Accepted Answer

A) 36.0 amu 
B) 35 amu 
C) 36.6 amu 
D) 35.5 amu 
E) 35.521 amu 
A) 36.0 amu 
B) 35 amu 
C) 36.6 amu 
D) 35.5 amu 
E) 35.521 amu

Question 12

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

Accepted Answer

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

Question 13

The ionization energy of atoms

Accepted Answer

A) decreases going across a period. 
B) decreases going down within a group. 
C) increases going down within a group. 
D) does not change going down within a group. 
E) None of the above. 
A) decreases going across a period. 
B) decreases going down within a group. 
C) increases going down within a group. 
D) does not change going down within a group. 
E) None of the above.

Question 14

The electron configuration of potassium is 1s22s22p63s1.

Accepted Answer

A) True 
 B)False

Question 15

Protons and neutrons are located in the nucleus of an atom.

Accepted Answer

A) True 
 B)False

Question 16

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

Question 17

Sulfur has 16 valence electrons.

Accepted Answer

A) True 
 B)False

Question 18

The atomic mass of an element is equal to

Accepted Answer

A) its mass number. 
B) its atomic number. 
C) one-twelfth of the mass of a carbon-12 atom. 
D) a weighted average mass of all of the naturally occurring isotopes of the element. 
E) the average mass of all of the naturally occurring isotopes of the element. 
A) its mass number. 
B) its atomic number. 
C) one-twelfth of the mass of a carbon-12 atom. 
D) a weighted average mass of all of the naturally occurring isotopes of the element. 
E) the average mass of all of the naturally occurring isotopes of the element.

Question 19

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

Accepted Answer

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

Question 20

Chromium is a metal.

Accepted Answer

A) True 
 B)False

Exam 4: Atoms

According to the Atomic Theory,

Which of the following is a characteristic of nonmetals?

A sodium atom is larger than a silicon atom.

silver

What is the electron configuration for aluminum?

Of the elements: B, C, F, Li, and Na. The element with the highest ionization energy is

Consider an isotope of sodium with a mass number of 25. The number of neutrons in this isotope of sodium is

Identify the metalloid in the following list.

The Group 8A(18) elements

The elements sodium, magnesium, and silicon

A sample of chlorine has two naturally occurring isotopes. The isotope Cl-35 (mass 35.0 amu) makes up 75.8% of the sample, and the isotope Cl-37 (mass = 37.0 amu) makes up 24.3% of the sample. What is the average atomic mass for chlorine?

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

The ionization energy of atoms

The electron configuration of potassium is 1s22s22p63s1.

Protons and neutrons are located in the nucleus of an atom.

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

Sulfur has 16 valence electrons.

The atomic mass of an element is equal to

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

Chromium is a metal.

Chemistry in Our Lives

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