Question

to which group K
and CA belong which have atomic number of 19 and 20​

Answer 1

Answer:

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Ca, as size decreases in a period due to an increase in the effective nuclear charge.

(b) K, as electropositive character decreases in a period due to an increase in the effective nuclear charge.

© K belongs to group 1 (Alkali Metals). Ca belongs to group 2 (Alkaline Earth Metals).

Explanation:

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Answer 2

Answer:

Group 1 63.5°C, 146.3°F, 336.7 K

Block s 0.89

Atomic number 19 39.098

State at 20°C Solid 39K

Electron configuration [Ar] 4s1 7440-09-

Explanation:

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