Answer:
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Explanation:
because ouytermost shell contains two electrons
calcium is in group 2 so its valency is two valency is the number of outer shelll electrons it needs to have an stable outer shell . it needs 2 more .
Answer: The total width of a crystal is 1.65 mm.
Explanation:
Horizontal length between the two molecules = 16.5 nm
Width of the 
molecules :
The total width of a crystal in millimeter=
The total width of a crystal is 1.65 mm.
Hello!
The fission of an atom that has a large atomic number can be induced by bombarding the atom with neutrons.
Nuclear fission occurs when a heavy nucleus divides into two or more lighter nuclei. This reaction is induced by the bombarding of neutrons into the nucleus, making it unstable (like throwing an orange to a perfectly arranged orange pyramid at the supermarket). The unstable nucleus breaks down into lighter elements, releasing more neutrons which contribute to the chain reaction.
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Answer:
Potassium selenide
Explanation:
Potassium selenide (K2Se)
