Question

Alpha particles used in the Gold foil experiments are Helium atoms that__?

1. Have no charge
2.have no negative particle
3.has lost all its neutrons
4.have no positive charges
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Answer 1

2. have no negative particle

Step-by-step explanation:

Helium atoms contains 2 neutrons and 2 protons (or 2 electrons). Thus, it has a mass number of 4 and atomic number of 2.

Alpha particles are heavy and positively charged, which make them to be deflected in a magnetic or electric charge. So, the helium atoms used as alpha particles for the gold foil experiment must have no negative particle.