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Norma-Jean [14]
3 years ago
13

Please help me out with these questions please.. Both are in 1 picture:)

Chemistry
2 answers:
jeka57 [31]3 years ago
8 0

Answer:

1. B

2. C

Explanation: The law that the properties of the elements are periodic functions of their atomic numbers. And the second one is, most of the air we breathe is made of oxygen.

saw5 [17]3 years ago
4 0
The first Answer is A and the second is B
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5.7*10^4 is equal to 57,000.

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