Chemistry
Give reasons for the following.
The physical properties of isotopes of the same element are not identical.
Related Questions
Explain the octet rule for formation of —
(a) Sodium chloride from a sodium atom and a chlorine atom.
(b) Nitrogen molecule from two nitrogen atoms.
Select the correct answer from the answers in brackets to complete each sentence.
- An element has electronic configuration 2, 8, 1 and 12 neutrons. Its mass no. is …………… [11/23/12]
- The maximum number of electrons in M-shell is …………… [8/32/18]
- Isotopes have same …………… [no. of neutrons / electronic configuration / atomic masses].
- An …………… [atom/ion] is capable of independent existence in solution.
- An atom with electronic configuration 2, 7 and mass number 19 will have …………… neutrons. [8/10/12]
Give reasons for the following.
The mass number of an atom is slightly less than the actual atomic mass.
Give reasons for the following.
The shells surrounding the nucleus of an atom are also called 'energy levels'.