What is the formula of calcium nitrate?
A) Ca3N2
B) Ca(NO2) 3
C) Ca(NO3) 2
D) Ca(NO2) 2
Correct Answer:
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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
Q32: The elements in group 7A form ions
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
Q38: Which is the correct formula of potassium
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