Help pleased alot of points

Chemistry

1 answer:

JulsSmile [24]2 years ago

4 0

Answer:

Nitrogen non metal

Gain 3 electrons

Negative ion N3-

Barium metal

Lose electrons

Positive charge

Selinium non metal

Gain electron

Negative charge

Cesium metal

Lose electrons

Positive charge

Explanation:

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Click on the event or events that led to the formulation of the cell theory

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