Question

Fluorine has nine protons and nine electrons. It is in column 17 on the periodic table. How many valence electrons does hydrogen have? 2 5 7 9

Answer 1

7 i just did the test and got it right

Step-by-step explanation:

Answer 2

Hydrogen has one electron

Step-by-step explanation:

Hydrogen is the first element in the Periodic Table, so it has only one valence electron.

For elements in Groups 13 to 18, then number of valence electrons equals the Group number – 10.

Fluorine is in Group 17, so it has seven valence electrons.