Elements And Masses Of Elements Question Preview (ID: 10928)
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All substances are composed of ________________.
a) ions
b) molecules
c) elements
d) mixtures
What is the chemical symbol for lead?
a) L
b) Pb
c) Le
d) K
What are the substances that cannot be broken down into simpler substances?
a) mixtures
b) molecules
c) elements
d) solutions
Which of the following chemical symbols represents the element sodium?
a) S
b) Na
c) Sc
d) N
Which of the following chemical symbols represents the element silver?
a) S
b) Si
c) Au
d) Ag
The atomic mass of an element is found by which of the following methods?
a) doubling the number of protons
b) adding the number of protons and electrons
c) adding the number of protons and neutrons
d) identifying the number of protons
Nickel has 28 protons. If it has 31 neutrons, what is its atomic mass?
a) 3
b) 59
c) 31
d) 28
The atomic mass of potassium is 39. If its atomic number is 19, it has how many neutrons within each potassium atom?
a) 19
b) 58
c) 39
d) 20
Zirconium has an atomic number of 40 and an atomic mass of 91. How many neutrons does it have?
a) 40
b) 131
c) 91
d) 51
Iodine has 53 protons and 74 neutrons. What is its atomic mass?
a) 21
b) 127
c) 74
d) 53
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