Chemistry
Match Column A with the correct reason in Column B.
| Column A | Column B |
|---|---|
| (a) 2713Al | 1) Has 18 electrons in M shell |
| (b) 11H | 2) Has 7 electrons in M shell |
| (c) Kr [Krypton] | 3) Has 27 nucleons in its nucleus |
| (d) 3717Cl | 4) Has 8 electrons in M shell |
| (e) 3919K | 5) Has no neutrons in its nucleus |
Related Questions
Give reasons:
Nitrogen molecule has no lone pair of electrons, while ammonia molecule has one lone pair.
Give reasons:
The octet & duplet arrangement seem to represent stability.
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 physical properties of isotopes of the same element are not identical.