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gavmur [86]
3 years ago
7

Please answer quick!!!!

Biology
1 answer:
dezoksy [38]3 years ago
4 0
The number of valence electrons in an atom is reflected by its position in the periodic table.

Sodium: one
Calcium: two
Zinc: two
Xenon: eight
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We can confirm that a segment of DNA that codes for RNA and can vary in length from a few hundred to as many as two million base pairs in length best defines a gene.

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