Question

1)Rutherford's a-particle scattering experiment led to the discovery of the ---
2)Isoptopes have same---- but different------
3)neon and chlorine have atomic number 10 and 17 respectively . their valeceis will be ----and ------respectively
4)the electronic configuration of silicon is-----and that of sulphur is------

Answer 1

Answer:

1)nucleus

2)number of protons,number of neutrons

3)8,7

4)2,8,4 and 2,8,6

Answer 2

Explanation:

ABC and its variations are initialism mnemonics for essential steps used by both medical professionals and lay persons (such as first aiders) when dealing with a patient. In its original form it stands for Airway, Breathing, and Circulation.