Unit 1 Re-Test

Front

What is the atomic number of an atom with 5 electrons?

Back

5

Front

What type of nuclear reaction occurs in stars?

Back

Nuclear fusion

Front

Who proposed the idea that the universe is made of atoms?

Back

Democritus

Front

What type of nuclear decay involves the emission of an alpha particle?

Back

Alpha decay

Front

Which subatomic particle has a negative charge?

Back

Electron

Front

What is the atomic mass of an atom with 5 protons and 6 neutrons?

Back

11

Front

What is the charge of a proton?

Back

Positive

Front

What is the primary difference between nuclear fusion and nuclear fission?

Back

Fusion combines nuclei; fission splits nuclei.

Front

What particle is found in the nucleus of an atom and has no charge?

Back

Neutron

Front

What is the significance of Democritus in atomic theory?

Back

He first suggested the existence of atoms.