Question

The word 'atom' is derived from the Greek word ____________.
A. atomic
B. atomos
C. atomey
D. atomoney

Answer 1

Hint:In the Greek mythology the word atom means atomos, which means uncuttable or indivisible. Atoms consist of three particles which cannot be further divided into its smaller particles.

Complete step by step answer:
Atom of an element is its basic component of an element and has electrons, protons and neutrons in its
structure. The electrons are present in the shells surrounding the nucleus and protons and neutrons are
present in the nucleus of the atom.

-Electrons: They are negatively charged ions present in the shells of an atom.
Mass of an electron is fixed which is $9.01 \times {10^{ - 31}}{\text{kilogram}}$.
-Protons: They are positively charged ions present in the nucleus of the atom.
Neutrons: They are the neutral species present along the protons in the nucleus of an atom.
The charge of nucleus is due to presence of protons and contribution of neutrons is nil to the charge of
nucleus, but the mass of both neutron and proton is quite similar which is $1.67 \times {10^{ - 24}}gram$.
-The mass of neutrons combined with the mass of protons, gives nucleus its density and hardness and the mass the electron is negligible in comparison to nucleus mass.
Thus, the nucleus is a hard and dense part of the atom.
Thus the correct option is B.

Note:
The arrangement of electrons around the nucleus follows a pattern in shells of an atom which is known
as electronic configuration of the atom. The series is as follows: \[1s,{\text{ }}2s,{\text{ }}2p,{\text{
}}3s,{\text{ }}3p,{\text{ }}4s,{\text{ }}3d,{\text{ }}4p,{\text{ }}5s,{\text{ }}4d,{\text{ }}5p,{\text{ }}6s,{\text{
}}4f,{\text{ }}5d,{\text{ }}6p,{\text{ }}7s,{\text{ }}5f,{\text{ }}6d\]. The arrangement of electron gives the
An atom is its property which makes it unique in the periodic table.