Question 1

Match the following.
-potassium

Accepted Answer

A)  Mg
B)  Fe
C)  Si
D)  K
E)  CF) B) and E)
G) A) and D)

Question 2

What is the atomic mass for tin?

Accepted Answer

A)   47.87
B)   50
C)   118.71
D)   22E) A) and B)
F) B) and C)

Question 3

When forming an ion, calcium, Ca, will ________ electron(s) .

Accepted Answer

A)   gain one
B)   gain two
C)   gain three
D)   lose one
E)   lose twoF) A) and E)
G) A) and D)

Question 4

Which of the following elements is a gas at room temperature?

Accepted Answer

A)   bromine
B)   carbon
C)   helium
D)   sodiumE) A) and B)
F) All of the above

Question 5

Why do elements in the same group tend to have similar chemical properties?

Accepted Answer

Since elements in the same group have th...

Question 6

What is the element symbol for an atom that has 5 protons and 6 neutrons?

Accepted Answer

A)   B
B)   C
C)   H
D)   NaE) All of the above
F) A) and C)

Question 7

What is the average mass, in grams, of one atom of carbon?

Accepted Answer

A)   5.01 × 10-22 g
B)   5.01 × 1022 g
C)   1.38 × 10-25 g
D)   1.99 × 10-23 g
E)   1.99 × 1023 gF) B) and C)
G) A) and E)

Question 8

How many protons does the I- ion possess?

Accepted Answer

A)   52
B)   54
C)   4
D)   7
E)   53F) A) and D)
G) B) and D)

Question 9

If 3.6 g of chlorine combines with sodium to make 6.0 g of sodium chloride, what mass of sodium is required?

Accepted Answer

A)   3.6 g
B)   2.4 g
C)   6.0 g
D)   9.6 g
E)   1.2 gF) B) and D)
G) B) and E)

Question 10

An atom that has an atomic number of 20 and a mass number of 42 is an isotope of an atom that has ________.

Accepted Answer

A)   an atomic number of 21 and a mass number of 42
B)   an atomic number of 20 and a mass number of 40
C)   22 neutrons and 20 protons
D)   22 protons and 20 neutronsE) C) and D)
F) B) and D)

Question 11

Which of the following statements is FALSE?

Accepted Answer

A)   Atoms are composed of protons, neutrons, and electrons.
B)   The number of protons in the nucleus of an atom is equal to its atomic number.
C)   Atoms that have lost or gained electrons form ions.
D)   Cations are negatively charged.
E)   Atomic mass number is equal to the sum of the number of protons and neutrons.F) A) and E)
G) A) and D)

Question 12

Identify the number of electrons in P-3.

Accepted Answer

A)   18
B)   12
C)   19
D)   15
E)   16F) A) and D)
G) A) and B)

Question 13

Dalton's atomic theory states ________.

Accepted Answer

A)   that all elements have several isotopes
B)   that matter is composed of small indestructible particles
C)   that the properties of matter are determined by the properties of atoms
D)   that energy is neither created nor destroyed during a chemical reaction
E)   that an atom is predominantly empty spaceF) B) and C)
G) C) and E)

Question 14

In a 41.5 g sample of carbon, how many atoms have a mass of 12.0107 u?

Accepted Answer

A)   2.08 × 1024
B)   3.00 × 1026
C)   12
D)   1.2 × 1021
E)   0F) A) and B)
G) B) and C)

Question 15

Match the following.
-silicon

Accepted Answer

A)  Mg
B)  Fe
C)  Si
D)  K
E)  CF) None of the above
G) B) and E)

Question 16

Which of the following elements is a noble gas?

Accepted Answer

A)   Ar
B)   Br
C)   N
D)   O
E)   KF) None of the above
G) D) and E)

Question 17

Zinc has five naturally occurring isotopes, Zn-64, Zn-66, Zn-67, Zn-68 and Zn-70. Calculate the atomic mass of zinc given the following abundances and atomic masses for the isotopes: 
Zn-64 63.9291 u 48.61%
Zn-66 65.9260 u 27.9%
Zn-67 66.9271 u 4.1%
Zn-68 67.9248 u 18.75%
Zn-70 69.9253 u 0.62%

Accepted Answer

A)   66.3 u
B)   65.4 u
C)   66.7 u
D)   65.1 u
E)   64.8 uF) A) and D)
G) A) and E)

Question 18

The number 6.022 × 1023 is known as ________.

Accepted Answer

Question 19

The atomic number is equal to the number of ________.

Accepted Answer

The answer of The atomic number is equal to the...

Question 20

If 8.32 g of copper is mixed with 5.2372 × 10-2 mol of zinc to create the alloy brass, how many metal atoms total are present in the brass?

Accepted Answer

A)   7.88 × 1022 metal atoms
B)   3.04 × 10-25 metal atoms
C)   1.10 × 1023 metal atoms
D)   3.15 × 1022 metal atoms
E)   3.15 × 10-22 metal atomsF) A) and E)
G) C) and D)

Exam 2: Atoms and Elements

Zinc has five naturally occurring isotopes, Zn-64, Zn-66, Zn-67, Zn-68 and Zn-70. Calculate the atomic mass of zinc given the following abundances and atomic masses for the isotopes: Zn-64 63.9291 u 48.61% Zn-66 65.9260 u 27.9% Zn-67 66.9271 u 4.1% Zn-68 67.9248 u 18.75% Zn-70 69.9253 u 0.62%

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Match the following. -potassium

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If 8.32 g of copper is mixed with 5.2372 × 10-2 mol of zinc to create the alloy brass, how many metal atoms total are present in the brass?

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An atom that has an atomic number of 20 and a mass number of 42 is an isotope of an atom that has ________.

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What is the average mass, in grams, of one atom of carbon?

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Dalton's atomic theory states ________.

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When forming an ion, calcium, Ca, will ________ electron(s) .

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What is the atomic mass for tin?

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Identify the number of electrons in P-3.

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If 3.6 g of chlorine combines with sodium to make 6.0 g of sodium chloride, what mass of sodium is required?

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In a 41.5 g sample of carbon, how many atoms have a mass of 12.0107 u?

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Why do elements in the same group tend to have similar chemical properties?

Correct AnswerverifiedSince elements in the same group have th...View AnswerShow Answer

How many protons does the I- ion possess?

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Which of the following elements is a gas at room temperature?

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Which of the following elements is a noble gas?

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Match the following. -silicon

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The number 6.022 × 1023 is known as ________.

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Which of the following statements is FALSE?

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The atomic number is equal to the number of ________.

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What is the element symbol for an atom that has 5 protons and 6 neutrons?

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If 8.32 g of copper is mixed with 5.2372 × 10^-2 mol of zinc to create the alloy brass, how many metal atoms total are present in the brass?

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Identify the number of electrons in P^-3.

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Since elements in the same group have th...
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How many protons does the I^-ion possess?

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The number 6.022 × 10²³ is known as ________.

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