Question

the discovery of the sixth quark was accomplished by
using the hubble space telescope
bombarding gold foil with alpha particles
experimenting with cathode ray tube
studying proton collisions
which of the following atomic particles is positively charged?
neutron
electron
proton
negatron
an element is made up of only one kind of atom.
true
false

Explanation:

1. The discovery of the sixth - top quark was made through high - energy proton - proton collisions in particle accelerators. The Hubble Space Telescope is for observing celestial objects, the gold - foil experiment was for understanding the atomic nucleus structure, and cathode - ray tube experiments were related to the discovery of electrons.
2. Neutrons are neutral, electrons are negatively charged, protons are positively charged, and negatron is another term for an electron (negatively charged).
3. By definition, an element is a pure substance made up of only one kind of atom.

Answer:

1. studying proton collisions
2. proton
3. True