SCSHS Atoms and Isotopes

What charge does a neutron have?

• Positive

• Negative

• Neutral

What charge does a proton have?

• positive

• neutral

• negative

What charge does an electron have?

• positive

• neutral

• negative

Isotopes of the same element have different numbers of ...

• neutrons

• Protons

• electrons

Isotopes of the same element have the same number of ...

• Protons

• neutrons

• electrons

Which type of radioactive decay results in a helium nucleus (2 protons and 2 neutrons) radiating out of the isotope?

• Alpha

• beta

• gamma

• delta

What type of radioactive decay results in a neutron changing into a proton and emitting an electron?

• alpha

• beta

• gamma

• delta

Which type of radioactive decay does not release particles, but releases energy in the form of a wave?

• beta

• gamma

• delta

• alpha

The time it takes for half of the original amount of an isotope to decay is known as its

• half life

• alpha decay

• life

• radioactive decay

Which scientist discovered NEUTRONS?

• Rutherford

• Thomson

• Chadwick

• Democritus