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Elements And Masses Of Elements
Test Description: Review questions
Instructions: Answer all questions to get your test result.
1) All substances are composed of ________________.
A
ions
B
mixtures
C
molecules
D
elements
2) What is the chemical symbol for lead?
A
L
B
Le
C
K
D
Pb
3) What are the substances that cannot be broken down into simpler substances?
A
elements
B
mixtures
C
solutions
D
molecules
4) Which of the following chemical symbols represents the element sodium?
A
Na
B
S
C
Sc
D
N
5) Which of the following chemical symbols represents the element silver?
A
Ag
B
S
C
Si
D
Au
6) The atomic mass of an element is found by which of the following methods?
A
identifying the number of protons
B
adding the number of protons and neutrons
C
adding the number of protons and electrons
D
doubling the number of protons
7) Nickel has 28 protons. If it has 31 neutrons, what is its atomic mass?
A
3
B
59
C
31
D
28
8) The atomic mass of potassium is 39. If its atomic number is 19, it has how many neutrons within each potassium atom?
A
58
B
19
C
20
D
39
9) Zirconium has an atomic number of 40 and an atomic mass of 91. How many neutrons does it have?
A
51
B
131
C
91
D
40
10) Iodine has 53 protons and 74 neutrons. What is its atomic mass?
A
74
B
21
C
53
D
127
*select an answer for all questions
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