How many protons are in an element with an atomic number of 8 and a mass number of 18?
a. 8
b. 10
c. 18
d. 3

answer

a the answer hopes this

step-by-step explanation:

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐