Question

the no. of protons in an atom of an element A is 19 then, the no. of electron in its A+ ion is ​

Answer 1

Answer:

18

Explanation: In the neutral atom of an element,

no of electron= 19

no of electroon in A+ = 19 - 1 = 18

Answer 2

Answer:

No of electrons are 18

Explanation:

No of proton = No of electron

But here it is A+ so an electron is loss

So No of proton = 19

No of Electron = 19 - 1 = 18

So the No of Electron is 18

A stable subatomic particle known as a proton has the symbols p, H+, or 1H+ with a positive electric charge of +1 e. (elementary charge). Its mass is 1,836 times greater than that of an electron and slightly less than that of a neutron (the proton–electron mass ratio). Nucleons are the collective name for protons and neutrons, which have masses of roughly one atomic mass unit apiece (particles present in atomic nuclei). Every atom's nucleus contains one or more protons. They offer the central electrostatic force that attracts and holds the atomic electrons together. The defining characteristic of an element is its atomic number, which is the number of protons in its nucleus (represented by the symbol Z). Since each component has a distinct number of protons, each element has its own unique atomic number, which determines the number of atomic electrons and consequently the chemical characteristics of the element.

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