Question 1

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

Accepted Answer

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

Question 2

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

Accepted Answer

A)  neutron.
B)  atom.
C)  nucleus.
D)  electron.
E)  proton.F) B) and E)
G) C) and D)

Question 3

The maximum number of electrons that may occupy the third energy level is

Accepted Answer

A)  18.
B)  32.
C)  8.
D)  10.
E)  2.F) None of the above
G) B) and E)

Question 4

The atomic mass of an element is equal to

Accepted Answer

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

Question 5

The number of dots in the electron dot structure of nitrogen is

Accepted Answer

A)  one.
B)  two.
C)  three.
D)  four.
E)  five.F) All of the above
G) A) and B)

Question 6

Semiconductors are located in the periodic table on (or in) the

Accepted Answer

A)  line dividing metals from nonmetals in the table.
B)  left side of the table.
C)  first period of the table.
D)  last period of the table.
E)  right side of the table.F) A) and B)
G) B) and E)

Question 7

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

Accepted Answer

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

Question 8

The element in this list with chemical properties similar to magnesium is

Accepted Answer

A)  sodium.
B)  chlorine.
C)  boron.
D)  strontium.
E)  carbon.F) B) and E)
G) A) and E)

Question 9

The mass number of an atom can be calculated from

Accepted Answer

A)  the number of neutrons.
B)  the number of electrons.
C)  the number of electrons plus protons.
D)  the number of protons plus neutrons.
E)  the number of protons.F) C) and E)
G) D) and E)

Question 10

Of the elements: Li, Na, K, Rb, and Cs, the element with the most metallic character is

Accepted Answer

A)  Li.
B)  Na.
C)  K.
D)  Rb.
E)  Cs.F) A) and B)
G) A) and D)

Question 11

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 24.2% of the sample. What is the average atomic
Mass for chlorine?

Accepted Answer

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

Question 12

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

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) C) and D)
G) C) and E)

Question 13

Select the correct symbol for the element.
-mercury

Accepted Answer

A)  Au
B)  Hg
C)  Ag
D)  Mc
E)  PbF) A) and D)
G) None of the above

Question 14

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

Accepted Answer

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

Question 15

Select the correct symbol for the element.
-potassium

Accepted Answer

A)  Po
B)  Pt
C)  P
D)  K
E)  KoF) A) and B)
G) C) and D)

Question 16

What is the element with the electron configuration

Accepted Answer

A)  Cl
B)  S
C)  F
D)  Ar
E)  BeF) B) and C)
G) C) and E)

Question 17

Identify the noble gas in the following list.

Accepted Answer

A)  gold
B)  chlorine
C)  helium
D)  oxygen
E)  nitrogenF) A) and D)
G) C) and E)

Question 18

The elements lithium, sodium, and potassium

Accepted Answer

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

Question 19

How many valence electrons are in the electron-dot structures for the elements in group 3A(13) ?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  6F) A) and B)
G) B) and E)

Question 20

Identify the metalloid in the following list.

Accepted Answer

A)  sulfur
B)  copper
C)  silver
D)  fluorine
E)  germaniumF) D) and E)
G) C) and E)

Exam 4: Atoms and Elements

The atomic mass of an element is equal to

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The elements lithium, sodium, and potassium

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

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The maximum number of electrons that may occupy the third energy level is

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Select the correct symbol for the element. -mercury

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Select the correct symbol for the element. -potassium

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What is the element with the electron configuration

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

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Semiconductors are located in the periodic table on (or in) the

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Identify the metalloid in the following list.

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The number of dots in the electron dot structure of nitrogen is

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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 24.2% of the sample. What is the average atomic Mass for chlorine?

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

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The mass number of an atom can be calculated from

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Of the elements: Li, Na, K, Rb, and Cs, the element with the most metallic character is

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How many valence electrons are in the electron-dot structures for the elements in group 3A(13) ?

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

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

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Identify the noble gas in the following list.

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The element in this list with chemical properties similar to magnesium is

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