Chemistry, asked by Kuldeep4825, 1 year ago

Atomic number atomic mass and valency of first 20 elements

Answers

Answered by Anonymous
0

Answer:

Element Atomic Number Valency

Argon 18 0

Potassium 19 +1

Calcium 20 +2

Scandium 21 +3

Answered by helpmehh
0

Explanation:

Argon 18 0

Potassium 19 +1

Calcium 20 +2

Scandium 21 +3

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