What is the period and group of this atom?

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1 Answer
Jan 2, 2018

Answer:

2nd period and halogen group

Explanation:

First,
Identify the element of this atom.

Since it has 9 protons, and the number of protons corresponds to the atomic number, we look at the periodic table for the element with an atomic number of 9, which is fluorine (F).

Second,
A period in the periodic table means its row. So, fluorine is in the second period.
A group or family means its column. The 7th column has its own name- the halogens.