Respuesta :

Answer:

2.7

Explanation:

This is because fluorine has an atomic number 9

Answer:

2, 7

Explanation:

Fluorine has 9 electrons and electronic structures are written listing the amount of electrons in each shell/energy level starting from the first one.

The first one can hold a maximum of 2 electrons and the 2nd, 3rd and 4rth can hold a maximum of 8

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