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Consider three elements A B and C all of which have atomic numbers of less then 20. The atomic number of A is x, and the atomic number of B is three less than the atomic number of A Element A forms cations
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Consider three elements A B and C all of which have atomic numbers of less then 20. The atomic number of A is x, and the atomic number of B is three less than the atomic number of A

Element A forms cations with formula A+ and reacts with element C to form a solid substance with the formula AC

What is element A
Which group does element C belong to

User Conio
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1 Answer

4 votes

Answer:

LiH

A is lithium

group 1 or 7

User Bibek Sharma
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