Two neutrons stuck to two protons. Also called a Helium 4 nucleus. A good article is in the link below.
Alpha particle strike to a substance introducing a + charge.
Alpha particle.
An alpha particle is made of 2 protons and 2 neutrons if that's what you mean
A Helium atom, containing two proton and two neutrons, that is emitted as a form of radiation.
The mass number of an element decreases by 4 when it decays by ejecting an alpha particle. This is because an alpha particle has a mass number of 4 and atomic number of 2. The atomic number of the element also decreases by 2.
partical
It is made by lord God, The Alpha and The Omega.
neutron
proton
an electron
h2o
because it a soid