Question

An atom of an element X contains 29 electrons and 35 neutrons. Deduce its atomic number and mass number. How will you represent the element X?

Answer 1

Answer:

An atom consists of protons, electrons & neutrons.A positive atom will contain higher number of proton(H+), a negative atom will have higher number of electrons(e-) & a neutral atom will contain same number of protons & electrons.Therefore,

(i) For an atom to be neutral, the number of protons is equal to the number of electrons.

∴ Number of protons in the atom of the given element = 29

(ii) The electronic configuration of the atom is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹⁰

Explanation:

Answer 2

Answer:

for a neutral atom no of electrons = no of protons therefore no of protons = 29

mass no = no of protons + no of neutrons = 29 + 35 = 64

atomic no = no of protons = 29

it can be represented as

${x}^{64}$

and 29 can be written at foot

hope it helps