Atoms are unstable unless they have a similar number of protons and neutrons. To make the carbon atom stable, add six neutrons to it. What’s the mass number now?

Match the following items. 1. high-intensity bundle of energy being emitted from some decaying nuclei gamma ray 2. particle radiating from the nucleus of some atoms beta particle 3. negative particle identical to an electron but radiating from a decaying nucleus alpha particle

Which best describes how johannes kepler developed his laws of planetary motion

Explanation for basic character?