Question

1. The particles given out when the nuclei of beryllium atoms are bombarded with alpha particles.
2. The temperature at which the molecular motion of a substance theoretically ceases.

Answer 1

Answer:

1. In 1930, German researchers bombarded the element beryllium with alpha particles (helium nuclei containing two protons and two neutrons with a charge of +2). ... This particle is called the neutron. Chadwick won the Nobel Prize in Physics in 1935 for his research.