Question

An element ‘x’ has 10 electrons, 10 protons and 10 neutrons. Find its atomic number and mass number​

Answer 1

Answer:

The total number of protons and neutrons in the nucleus is called mass number of the atom. It is generally represented by th letter A.

Mass Number(A) = Number of Protons + Number of Neutrons

As given, the atom of an element contains 10 protons and 12 neutrons , therefore,

mass number = 10 + 12 = 22

So, the mass number of the element is 22.

Answer 2

ATOMIC STRUCTURE -

• The atom of an element consists of electrons revolving around the nucleus.
• The nucleus consists of protons and neutrons that form the mass of an atom.
• Atomic number = number of electrons in the ground state of the atom = Number of protons
• Atomic mass = Total sum of protons and neutrons.
• In the given example, the atom of the element has -

Electrons = 10

Protons = 10

Neutrons = 10

Atomic number = 10

Atomic mass = 10 + 10 = 20

The element with atomic number 10 and atomic mass 20 is NEON.