Which symbol and unit of measurement are used for electric current? a. symbol: C; unit: A
b. symbol: 1; unit: C
C. symbol: 1; unit: A

C. symbol: 1; unit: A

Explanation:

The symbol and unit of electric current is given as symbol: I; unit: A

According to ohms law;

   I  =  

 I is the current

 V is the voltage

 R is the resistance.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8