Question

30 marks Q.1 Select the correct answer from the answers in brackets to complete each sentence. [5] 1. An element has electronic configuration 2,8,1 and 12 neutrons. Its mass no. is. [11/23/12] 2. The maximum number of electrons in M-shell is [8/32/18] 3. Isotopes have same [no. of neutrons / electronic configuration / atomic masses]. 4. An -[atom /ion) is capable of independent existence in solution. 5. An atom with electronic configuration 2,7 & mass number 19 will have — neutrons. [8/10/12] 151​

Answer 1

Answer:

1.23

2.18

3.atomic masses

4.atom

5.10

Explanation:

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