Question

Which of the following statement is always correct? (a) an atom has equal number of electrons and protons
(b) an atom has equal number of electrons and neutrons
(c) an atom has equal number of protons and neutrons
(d) an atom has equal number of electrons, protons and neutrons

Answer 1

Answer:

the answers to your question isssss.....

Explanation:

an atom has equal number of electrons and protons

Answer 2

Answer: correct option is A which is an atom has equal number of electrons and protons.

Explanation:

Explanation of the correct option:

(A) An atom has the same number of electrons and protons

An atom is electrically neutral.

So the number of protons should equal the number of electrons.

Atomic number = number of protons (p) = number of electrons (e).

Explanation of incorrect options:

(B) An atom has equal numbers of electrons and neutrons.

In some cases, an atom has an equal number of electrons and neutrons.

The atomic mass number (M) is equal to the sum of the number of protons and neutrons in the nucleus.

The number of neutrons is equal to the difference between the atomic mass number (M) and the atomic number (Z).

(C)An atom has equal number of protons and neutrons

If an atom has the same number of protons and neutrons, then the mass number (M) will be twice the atomic number (Z).

(D) An atom has equal numbers of electrons, protons, and neutrons.

An atom has an equal number of protons and electrons.

Isotopes are atoms with different numbers of neutrons in their atomic nuclei that belong to the same element (same number of protons).

So option (A) is correct. An atom has the same number of electrons and the correct option is protons.

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