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Choose the correct statement(s) and correct the false statement(s). (i) Elements are made up of molecules and compounds are made up of atoms. (ii) The molecule of a compound is always made up of two or more atoms of the same kind. (iii) One molecule of nitrogen gas contains three nitrogen atoms. (iv) Water is made of two hydrogen atoms, covalently bonded with one oxygen atom.
View Answer
- (i) False — elements are made of atoms; compounds are made of atoms of different elements (often as molecules).
- (ii) False — a molecule of a compound is made of atoms of different kinds.
- (iii) False — a nitrogen molecule (N₂) contains two nitrogen atoms, not three.
- (iv) True — water has two hydrogen atoms covalently bonded to one oxygen atom.
Statement
Verdict & corrected version
(i)
Elements are made up of molecules and compounds are made up of atoms.
False
— corrected: elements are made of
atoms
; compounds are made of
molecules
of two or more different elements.
(ii)
The molecule of a compound is always made up of two or more atoms of the same kind.
False
— corrected: a compound molecule has atoms of
different
kinds.
(iii)
One molecule of nitrogen gas contains three nitrogen atoms.
False
— corrected: nitrogen gas is N₂, so it contains
two
nitrogen atoms.
(iv)
Water is made of two hydrogen atoms, covalently bonded with one oxygen atom.
Correct
— H₂O: two H atoms share electrons with one O atom.
