Valiancy depends upon number of electrons present in the……………
a) most inner shell
b) outermost shell
c) middle shell
d) anyone in the above
…….is a charged particle that is formed by the removal or addition of one or more electrons from an atom or molecule.
a) valiancy
b) Ion
c) isotopes
d) none of these
If an electron or more than one electrons are removed from an atom, it becomes a positive ion which is also known as………..
a) cation
b) anion
c) both a and b
d) none of these
If an electron or more than one electrons are added to an atom, it becomes a negative ion which is also known as………..
a) cation
b) anion
c) both a and b
d) none of these
The representation of molecule of a compound in the form of symbols is called…………
a) Symbols
b) Deutrium
c) chemical formula
d) isotopes
CaCO3 is the chemical formula of……………
a) Calcium carbonate
b) Calcium carbon Di oxide
c) Sulphuric acid
d) Ammonia
