Year 9 Radiation

Alpha particles.....

• a) are positively charged.
• b) consist of two protons and four neutrons.
• c) can penetrate any thickness of matter
• d) All of the above 

Tags

NGSS.HS-PS1-8

When a nucleus undergoes gamma decay, the atomic number of the element....

• remains the same

• decreases by one.

• increases by one.

• increases by two.

Radioactive materials have unstable...

• electrons
• protons
• nuclei
• neutrons

The type of radioactive particle that can be stopped by a sheet of paper is the ____.

• alpha particle
• beta particle
• gamma ray
• positron

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

• alpha particle
• gamma rays
• beta particles
• X rays

Tags

NGSS.HS-PS1-8

Two atoms of the same element but with different mass numbers are called________

• electrons
• isotopes
• ions
• reaction partners

What do these isotopes of carbon all have in common?

¹²₆C, ¹³₆C, ¹⁴₆C

• they all have the same number of neutrons & mass number

• they all have the same atomic number and neutrons

• they all have the same atomic number and electrons

• they all have the same number of protons, atomic number, and mass number

Which type of nuclear radiation is being emitted here?

• Alpha

• beta

• gamma

• none

Positively charged particles that consist of two protons and two neutrons are called

• alpha particles
• beta particles
• gamma rays
• neutron emissions

In order of most to least penetrating radiation we have

• Alpha , Beta,  Gamma
• Beta , Gamma , Alpha
• Gamma, Beta, Alpha
• Gamma, Alpha, Beta