Question

the atomic number of an element is 12 and its mass number is 24 . the correct order representing the number of electrons , protons and neutrons respectively in this atom is​

Answer 1

Answer:

atomic number of an element = number of protons = 12

number of protons = number of electrons in a neutral atom = 12

Explanation:

mass number = number of protons + number of neutrons

24 = 12 + number of neutrons

number of neutrons = 24 - 12 = 12

Answer 2

Question can be answered without the options. The solution is as follows -

Given - Atomic number of element - 12

Mass number of element - 24

Find - The correct order representing the number of electrons , protons and neutrons respectively in the atom.

Solution - Atomic number of an element is equal to the number of protons present in the nucleus. Which is further equal to the number of electron present in the nucleus to balance the charge in neutral element.

Number of neutrons in nucleus can be calculated as the difference of mass number and number of protons.

Therefore, Number of electrons and number of protons is 12.

Number of neutrons = 24 - 12 = 12.

Hence, the correct order representing the number of electrons, protons and neutrons respectively in this atom is 12, 12, 12.