Where are electrons placed in an atom?

Academic Chemistry NCERT Class 8

Electrons are negatively charged particles revolving in orbits at varying distances from the nucleus. The orbits vary in shapes from elliptical to circular in shape.

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Updated on: 10-Oct-2022

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(a) What are valence electrons? Where are valence electrons situated in an atom?(b) What is the number of valence electrons in the atoms of an element having atomic number 13? Name the valence shell of this atom.
State the location of electrons, protons and neutrons in an atom.
The anion of an element has :(a) more electrons than the normal atom(b) less electrons than the normal atom(c) more protons than the normal atom(d) same number of electrons as normal atom
The number of protons and electrons are same in an atom. Then why is it wrong to say that atomic number of an atom is equal to its number of electrons?
If K and L shells of an atom are full, then what would be the total number of electrons in the atom?
The cation of an element has :(a) the same number of electrons as its neutral atom(b) more electrons than a neutral atom(c) less protons than a neutral atom(d) less electrons than a neutral atom
Name the scientists who described the arrangement of electrons in an atom.
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
Which shell of an atom can accommodate a maximum of :(a) 8 electrons? (a) 32 electrons?
Name the central part of an atom where protons and neutrons are held together.
Name the shell of an atom which can accommodate a maximum of :(a) 2 electrons?(b) 18 electrons?
An atom Y contains 10 electrons and 10 neutrons, then what will be the no. of protons in atom Y?
What is the relationship between an atom containing 11 protons, 11 electrons and 11 neutrons, and another atom containing 11 protons, 11 electrons and 12 neutrons?
An element has atomic number 13 and an atomic mass of 27.(a) How many electrons are there in each atom of the element?(b) How are these electrons distributed in the various energy levels?
What is the maximum number of electrons which can be accommodated in the :(a) innermost shell of an atom?(b) outermost shell of an atom?

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