Chapter 9
Atomic Foundations of Matter
CBSE Class 9
Science Solutions
Educart Science class Class 9 NCERT Exemplar cover
Question:

Choose the correct statement(s) and correct the false statement(s).

(A) Elements are made up of molecules and compounds are made up of atoms.

(B) The molecule of a compound is always made up of two or more atoms of the same kind.

(C) One molecule of nitrogen gas contains three nitrogen atoms.

(D) Water is made of two hydrogen atoms, covalently bonded with one oxygen atom.

Answer: Verified

Statement (A) is incorrect because elements and compounds both are made up of atoms. Molecules are formed when atoms combine together.

Statement (B) is incorrect because the molecule of a compound is made up of atoms of different elements, not atoms of the same kind.

Statement (C) is incorrect because one molecule of nitrogen gas contains two nitrogen atoms (N₂).

Statement (D) is correct because water (H₂O) consists of two hydrogen atoms covalently bonded with one oxygen atom.

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