Question

E. The atom of an element has the 9 protons, 9 electrons and 10 neutrons.
i. What is the atomic number of the element?
li. What is the mass number of the element?
iii. State the valency of the element.
iv. Write the electronic configuration of the element.
v. Predict the real element.​

Answer 1

Answer:

atomic number =9

mass number = z = p + n

= 9+10

= 19

Answer 2

Answer:

i.9

ii.19

iii.1

iv. 1s22s22p5

v.fluorine