Question

Qn.One atom has 11 protons and 13 neutrons. Another has 11 protons and 12 neutrons. Are they the same or different elements? Explain

Answer 1

Explanation:

The atomic mass of an atom is the sum of protons and neutrons in an atom.

Atomic mass= No.of protons +No. Of Neurons

=11+12

=23

Answer 2

Question:

One atom has 11 protons and 13 neutrons. Another has 11 protons and 12 neutrons. Are they the same or different elements? Explain.

Concept:

Atoms: It is a particle that is the smallest and also a matter that uniquely defines a chemical molecule.

It is composed of protons ( positive charge ), electons ( negative charge ) and neutrons ( no charge).

Mass number : Sum of protons and neutrons of a atom.

Answer:

They are same elements.

Explanation:

If they have different neutron number then they will have different mass number and difference in mass number indicates that isotopes.

Isotopes have same atomic number but mass number is different.

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