what happens to protons when a electron is lost or gained by an atom as the no of electrons is equal to proton

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Solution

In an atom, number of protons are equal to number of electrons. So, when an electron is lost or gained or lost by an atom, nothing will be happened to protons.
If an electron is lost by an atom, the number of protons becomes more than the number of electrons. So atom becomes a cation with valency 1+.
If an electron is gained by an atom, the number of electrons becomes more than the number of protons. So atom becomes an anion with valency 1-.

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Q. When an ionic bond forms, eg Na and Cl, one electron is transferred to chlorine by sodium. It forms one positive ion Na+ and negative ion Cl-. But what happens to protons of both these elements, and no of proton and electron should be equal, now sodium has only 10 electron but 11 protons and chlorine has 10 electron but 9 protons ??? Didn't atoms need to be as a whole neutral?

Question 110 (iii)

Science Application An atom consists of charged particles called electrons and protons. Each proton has a charge of +1 and each electron has a charge -1. Remember the number of electrons is equal to the number of protons, while answering this question :
What will be the charge on an atom, if it gains an electron?

What happens when there is a gain or loss of electrons in an atom?

Which of the following statement is correct about the atom of an element ?

(a) an atom can have only protons and neutrons but no electrons.

(b) an atom can have only electrons and neutrons but no protons

(d) an atom must always have a proton, neutron and electron

Q. 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

(d) an atom has equal number of electrons, protons and neutrons

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