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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
molecules
C
elements
D
mixtures
2) What is the chemical symbol for lead?
A
Le
B
K
C
L
D
Pb
3) What are the substances that cannot be broken down into simpler substances?
A
molecules
B
elements
C
mixtures
D
solutions
4) Which of the following chemical symbols represents the element sodium?
A
Na
B
Sc
C
N
D
S
5) Which of the following chemical symbols represents the element silver?
A
Au
B
Ag
C
S
D
Si
6) The atomic mass of an element is found by which of the following methods?
A
doubling the number of protons
B
identifying the number of protons
C
adding the number of protons and electrons
D
adding the number of protons and neutrons
7) Nickel has 28 protons. If it has 31 neutrons, what is its atomic mass?
A
31
B
3
C
28
D
59
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
91
B
40
C
51
D
131
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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