A Helium atom, containing two proton and two neutrons, that is emitted as a form of radiation.
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
Two neutrons stuck to two protons. Also called a Helium 4 nucleus. A good article is in the link below.
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
neutron
proton
an electron
h2o
because it a soid
Gods Partical