Select ALL the correct answers.

Question

Which of the following statements about atoms are true?

All known substances are made of molecules.
All ordinary substances are made of atoms.
Atoms are always joined directly to other atoms.
Atoms may be arranged in repeating crystal patterns.
Atoms may be joined together in well-defined molecules.

Answer 1

The correct statements about atoms are:

• All ordinary substances are made of atoms.
• Atoms may be arranged in repeating crystal patterns.
• Atoms may be joined together in well-defined molecules.

The statement "All known substances are made of molecules" is not correct because some substances exist as individual atoms, such as noble gases. The statement "Atoms are always joined directly to other atoms" is also misleading, as individual atoms can exist in a gaseous state without being bonded to other atoms.