3 years ago

Why are all of the substances on the periodic table classified as elements?

2 answers:

5 0

Substances on the periodic table cannot be broken down into other substances and are therefore elements. I just took the test and this is correct.

4 0

All elements are pure substances.

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Nookie1986 [14]

<span>3 elements
Nitrogen
Hydrogen
Oxygen

2 nitrogen 4 hydrogen and 3 oxygens
there are only 3 different elements</span>

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Dovator [93]

Mass =?
moles of N2 = 4.25 x 103 mol
molar mass of N2 = (14)x2 = 28

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rusak2 [61]

Answer:

Please refer to the attachment for answers.

Explanation:

Please refer to the attachment for explanation

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Marysya12 [62]

Lithium 6 would have 6 valence electrons in the outer orbital, while lithium 7 would have 7 in the outer orbital.

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