What is the abbreviation used in the Periodic Table for hydrogen?
The number of protons in the nucleus of an atom of that element is_______?
A. Atomic number
B. Atomic weight
C. Mass number
Which best describes Oxygen?
A. Oxygen is a halogen
B. Oxygen is a nonmetal
C. Oxygen is a noble gas
D. Oxygen is a rare earth element
In the Periodic Table, the vertical columns that extend down the Periodic Table are called________?
D. Sub Element
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