Radioactivity

Front

What is Half-life?

Back

The amount of time it takes for half the nuclei in a sample of the isotope to decay.

Front

An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

Back

6

Front

What particle is released when an unstable isotope undergoes alpha radiation?

Back

A helium nucleus.

Front

Negatively charged particles emitted from a nucleus at a high speed are ____ .

Back

Electrons.

Front

This particle determines what element you have - the element's identity.

Back

Proton.

Front

What is radioactivity?

Back

The process by which unstable atomic nuclei lose energy by emitting radiation.

Front

What are the three main types of radiation?

Back

Alpha particles, beta particles, and gamma rays.

Front

What is an alpha particle?

Back

A helium nucleus consisting of two protons and two neutrons.

Front

What is a beta particle?

Back

A high-energy, high-speed electron or positron emitted by certain types of radioactive nuclei.

Front

What is gamma radiation?

Back

Electromagnetic radiation of high frequency and energy emitted from a nucleus.