Which description of current in a metal is correct[1]AFlow of positive atomsBFlow of moleculesCFlow of protonsDFlow of electronsReset

Analyzing the Options

1. Option A: Flow of Positive Atoms

   • This option suggests that positive atoms are the carriers of current, which is not accurate. In metals, current is primarily carried by charged particles, not neutral atoms.

2. Option B: Flow of Molecules

   • Molecules are not responsible for electric current in metals. Current in solid conductors typically involves the movement of charged particles rather than entire molecules.

3. Option C: Flow of Protons

   • While protons carry a positive charge, protons are bound within atomic nuclei and do not move freely in metallic conduction, making this option incorrect.

4. Option D: Flow of Electrons

   • This is the correct description. In metals, electrical current results from the movement of free electrons, which are negatively charged particles that can move easily through the metallic lattice.

Final Answer

The correct description of current in a metal is D: Flow of electrons.