The elements in group 7A form ions with a charge of
A) +7
B) +1
C) -7
D) -1
Correct Answer:
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Q27: Which is a binary compound?
A)O2
B)O3
C)NaClO3
D)NaCl
Q28: The metals in group 2A form ions
Q29: The elements in group 6A form ions
Q30: What is the formula of barium oxide?
A)BaO
B)BaO2
C)Ba2O
D)Ba2O3
Q31: What is the formula of iron (III)oxide?
A)(FeO)
B)(Fe3O2
Q33: What is the formula of calcium nitrate?
A)Ca3N2
B)Ca(NO2)3
C)Ca(NO3)2
D)Ca(NO2)2
Q34: The metals in group 1A form ions
Q35: What is the formula of copper (II)oxide?
A)CuO
B)Cu2O
C)CuO2
D)CuO3
Q36: Which is the formula of iron (II)nitrate?
A)Fe3NO3
B)FeNO3
C)Fe(NO3)2
D)Fe2NO3
Q37: What is the formula of magnesium sulfide?
A)Mg2S
B)MgS2
C)MgS
D)Mg3S
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