Question

Element Y has a proton number of 7. It also has seven neutrons.
(a) Deduce (i) the number of electrons in an atom of Y; (ii) the nucleon number of Y.
(b) Represent Y by writing the chemical symbol, including the proton and
nucleon numbers.​

Answer 1

Answer:

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Answer 2

ATOM -

An atom is the smallest unit of matter.An atom consists of electrons that revolve around the nucleus.The nucleus is centrally located containing protons and neutrons.The atomic number is given by the number of electrons or protons in an atom.Atomic mass or nucleons number is the representation of the sum of protons and neutrons in the nucleus of an atom.An element is represented as - X_A^ZXAZ  where, X is the symbol of the element, Z is the atomic number, and A is the atomic mass.In the given element,

Given -

Protons - 7

Neutrons - 7

(i) Number of electrons = Number of protons

Therefore, number of electrons = 7

(ii) Nucleon number = Protons + Neutrons

Nucleons = 7 + 7 = 14

The element with atomic number 7 and atomic mass 14 is NITROGEN.

The chemical representation is -

                                                  N^7_1_4