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sergiy2304 [10]
3 years ago
15

What is atom ? chemistry​

Chemistry
1 answer:
Neporo4naja [7]3 years ago
3 0

Answer:

atom is the smallest unit of matter that has the characteristic properties of a chemical element. 

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Answer:

The half-life of Material 1 and Material 2 are equal.

step by step explanation;

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Material 2 disintegrates to half its mass three times in 21.6 s, to go from 200g to 25g. That is,

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This means that regardless of their initial masses involved, material 1 and material 2 have equal half-life.

Their half-life is 21.6 ÷ 3 = 7.2 sec

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