Radioactivity

The three types of nuclear radiation in order of decreasing penetrating power are

• alpha, beta, gamma

• alpha, gamma, beta

• beta, alpha, gamma

• gamma, alpha, beta

Name the instrument used to detect radioactivity.

• voltmeter

• ohmeter

• seismograph

• geiger counter

What makes something radioactive?

• elements with an atomic number above 81

• an unstable nucleus

• contaminated sewage

• It decays over time

Which particles make up the nucleus of an atom?

• protons and neutrons

• electrons and protons

• electrons, protons, and neutrons

• electrons and neutrons

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

• 11
• 5
• 6
• 16

Tags

NGSS.MS-PS1-1

An isotope of an element has the same number of _________, but a different number of _________.

• Protons, electrons

• Protons, neutrons

• Electrons, neutrons

• Neutrons, protons

Tags

NGSS.HS-PS1-8

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

• protons
• neutrons
• electrons
• protons and neutrons

Which type of radiation releases an electron?

• Alpha radiation

• Beta radiation

• Gamma radiation

• Theta radiation

What is the mass number of this isotope?

• 131

• 53

• 184

• 78

What is the atomic number of this isotope?

• 131

• 53

• 184

• 78