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In each of the following cases, give the number or the element symbol represented by X. 40 18 X X 20 Ca 31 X P

In each of the following cases, give the number or the element symbol represented by X. 40 18 X X 20 Ca 31 X P
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17 votes
In each of the following cases, give the number or the element symbol represented by X.

40 18 X
X 20 Ca
31 X P

User Ahmed Mokhtar
by
7.6k points

2 Answers

10 votes
1) Ar, argon
2) 40
3) 15
User Nrzonline
by
8.0k points
10 votes

Answer:

X20 Can it is answer for this question

User Erik Kubica
by
8.7k points
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