Which of these is a characteristic of plant-like protists?
1.they are called protozoans.
2.they are all unicellular.
3.they are called algae.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

→

answer; 4 electrons;