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dangina [55]
2 years ago
9

Which describes the heliocentric model of the solar system? (1 point)

Chemistry
1 answer:
maw [93]2 years ago
6 0

Answer:

D

Explanation:I alredy know this i am in 7th gread

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the difference in electronegativity is so large (2.04) that the bonding electrons spend almost all their time on the nitrogen atom.

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Because calcium loses 2 electrons to become Ca2+, and nitrogen gains 3 electrons to become N3−, you need two calcium atoms and three nitrogen atoms in order to form a neutral compound.

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