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Brums [2.3K]
3 years ago
9

What is the period number in which helium is found

Chemistry
2 answers:
julsineya [31]3 years ago
6 0

Answer:

Helium is the second element on the periodic table. It is located in period 1 and group 18 or 8A on the righthand side of the table. This group contains the noble gases, which are the most chemically inert elements on the periodic table. Each He atom has two protons and usually two neutrons and two electrons.

Explanation:

thoughtco.com

GaryK [48]3 years ago
5 0

Answer:

period 1 and group 18 or 8A on the righthand side of the table.

Explanation:

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Answer:

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How many moles are in 20 grams of Ar?​
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Answer:

moles Ar in 20g = 0.500 mole Ar

Explanation:

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3 years ago
An unknown aqueous metal analysis yielded a detector response of 0.255. When 1.00 mL of a solution containing 100.0 ppm of the m
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1.022ppm is the unknown concentration of the metal

Explanation:

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1.022ppm is the unknown concentration of the metal

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A solution that contains a large amount of solute would be described as what
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