An alpha particle is also referred to as a nucleus of which isotope?
All large radioactive atoms decay into smaller atoms by
releasing alpha particles. Each alpha particle has 2
protons, 2 neutrons, and electrons. The table below
describes several neutral, low-mass atoms.
Stable Isotopes of Low-Mass Elements
Element Name Symbol Atomic Number of
Number Neutrons
Hydrogen H
1
0
Helium
He
2
2
Lithium
Li
3
4
Beryllium
Be 4
5
O lithium-7
O helium-4
O hydrogen-2
O helium-2

intermolecular forces are the forces between molecules or particles.

there are two kinds of van der waals forces: weak london dispersion forces and stronger dipole-dipole forces.

in molecule of water there are dipole-dipole forces between negatively charged oxygen from one molecule of water and positively charger hydrogen of another molecule of water.

hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (h), covalently bound to a highly electronegative atom such as flourine (f), oxygen (o) and nitrogen (n) atoms.