<span>A ) AB is a compound . Ionic compound because the electronegativity differs a lot in both !
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B) Same
C ) Compound . But the bond between them is covalent .
D ) AB is an ionic compound . A is the cation and B is the anion </span>
When particles collide with the surface of the solid.
Answer:
"The elements are arranged in seven horizontal rows,called periods or series,and 18 vertical columns,called Groups."
Explanation:
Risk*
