The positively charged part of the nucleus, the number of these subatomic particles represents the Atomic Number of an atom.
What is the proton?
100
This radioactive particle has 2 protons and 2 neutrons and is essentially a Helium nucleus.
What is an Alpha particle?
100
This famous scientist used the results of the Gold Foil experiment to develop a new atomic theory that contradicted the plum pudding model
Who was Rutherford?
200
The smallest of the three main subatomic particles and is negatively charged.
What is an electron?
200
A form of nuclear radiation that has no mass and can travel through a vaccum.
What is gamma radiation?
200
He is not really a scienctist but he was the first to propose that matter is composed of atoms.
Who is Democritus?
300
This subatomic particle is found in the nucleus, has the same mass as a proton, but has no charge.
What is the neutron?
300
A kind of nuclear radiation that cannot penetrate heavy clothing.
What is Alpha radiation?
300
The scientists who was able to predict the properties of undiscovered elements, he was known as the father of the periodic table.
Who is Mendeleev?
400
The sum of the protons and neutrons in the nucleus of a single atom
What is mass number?
400
The only type of nuclear radiation that causes the parent atom to increase in atomic number.
What is beta radiation?
500
The term given for atoms of the same element that have different mass because they have different numbers of neutrons.
What is "isotope?"
500
This type of nuclear radiation causes the number of neutrons to decrease by two and the number of protons to decrease by two. The daughter particle has a mass number that is 4 less than the parent particle.