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nexus9112 [7]
2 years ago
12

Helium is in group 18 of the periodic table. How is helium different from the other elements in this group?

Chemistry
1 answer:
pishuonlain [190]2 years ago
7 0

Answer:

Helium is in group 18 of the periodic table. How is helium different from the other elements in this group? = Helium atoms have 2 valence electrons, while atoms of the other elements in the group all have 8 valence electrons.

An emission spectrum will occur when = An electron releases energy and falls back to a lower energy level.

Explanation:

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3 years ago
Compare 1 mole of H2, 1 mole of O2, and 1 mole of F2. (a) Which has the largest number of molecules? Explain why. (b) Which has
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<u>a) Answer: </u>

<em>Number of molecules in 1 mole</em>

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