Question

(a) Name the three fundamental particles of an atom. Give the symbol and charge of each particle.

(b) Draw the orbital diagram of ${}_{20}^{40}C{a}^{2+}$ ion and state the number of three fundamental particles present in it.

Answer 1

(a)
Symbol Charge
Electron $e^{1-}$ $-1$
Proton $p^{1+}$ $+1$
Neutron n 0
(b)

i. Electron 18
ii. Neutron 20
iii. Proton 20