kate17768 kate17768

04-02-2021
Chemistry

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I am an element in period 4 with 7 valence electrons.

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jgrubbsrich jgrubbsrich

04-02-2021

Answer:

The elements in this family are fluorine, chlorine, bromine, iodine, and astatine. Halogens have 7 valence electrons, which explains why they are the most active non-metals.

Explanation:

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ka9754833 ka9754833

04-02-2021

Answer:

Selenium

Explanation:

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