Question

Chlorine has atomic number 17 and is in Group 7A. How many valence electrons does chlorine have?
A. 17
B. 8
C. 10
D. 7

Answer 1

Chlorine:

Atomic Number = 17

Atomic Mass = 35.453

Amount of Protons = 17

Amount of Neutrons = 18

Amount of Electrons = 17

Therefore your answer is option A "17." You can find the number of electrons by looking at the elements atomic number which is equal to the amount of protons the element has then the protons is equal to the amount the electrons it has so....

$AN=17$

$P=17$

$E=17$

Hope this helps.

Answer 2

Answer:7

Explanation:Electrons in the outer shells that are not filled are called valence electrons. The atomic number of chlorine is 17. Hence it has got 7 electrons in its outermost shell.