Radioactivity and Half life

Which type of radiation is stopped by lead and concrete?

• Alpha

• Beta

• Gamma

• Neutron

Which order is correct for the most to least ionising

• Alpha-Beta-Gamma

• Beta-Alpha-Gamma

• Gamma-Beta-Alpha

• Gamma-Alpha-Beta

Which type of radiation has 2 protons and 2 neutrons

• Alpha

• Beta

• Gamma

• Neutron

Tags

NGSS.HS-PS1-8

Which type of radiation is used by smoke detectors?

• Alpha

• Beta

• Gamma

• Neutron

In beta becay…..

• A neutron becomes a proton and an electron

• A proton becomes a neutrons and an electron

• A electron becomes a protons and a neutron

• It's just a wave

Tags

NGSS.HS-PS1-8

In beta decay a ______ is emitted from the nucleus

• Neutron

• Electron

• Proton

• Wave

Tags

NGSS.HS-PS1-8

Which two types of radioactive decay cause an atom of a new element to form?

• Alpha and Beta

• Beta and Gamma

• Alpha and Gamma

• None, no new element would form.

Tags

NGSS.HS-PS1-8

Which is the best definition of half-life?

• Half the mass of the substance is left.

• Only half the time taken for decay to occur

• time taken for radioactivity to halve.

• Half total decay occurs in a certain time.

Tags

NGSS.HS-PS1-8

If the radioactivity of a substance starts at 500 Bequerels. What will the radioactivity be after one half life?

• 1000

• 250

• 125

• 500

Tags

NGSS.HS-PS1-8

If the radioactivity of a substance starts at 800 Bequerels. What will the radioactivity be after two half lives?

• 800

• 400

• 200

• 100

Tags

NGSS.HS-PS1-8