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Makovka662 [10]
2 years ago
12

Which of the following is supported by reliable evidence?

Chemistry
1 answer:
Tasya [4]2 years ago
3 0
B. Theory of gravity
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Calcum chloride contains only calcum and chloride What is the fomula for this compound? fou need the Peodie Table for thia quest
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Answer:

CaCl_2

Explanation:

Calcium is the element of the group 2 and period 4 which means that the valence electronic configuration is [Ar]4s^2.

Chlorine is the element of the group 17 and period 3 which means that the valence electronic configuration is [Ne]3s^23p^5.

Thus, calcium losses 2 electrons to 2 atoms of chlorine and these 2 atoms of chlorine accepts each electron to form ionic bond. This is done in order that the octet of the atoms are complete and they become stable.

Ca         Cl

2            1

Cross multiplying the valency, We get, CaCl_2

Thus, the formula of calcium chloride is CaCl_2.

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