Alpha Decay

An isotope is a version of an element with the same number of protons but different number of (a)   .

Describe the structure of an alpha particle.

• a fast-moving electron

• 2 protons and 2 neutrons

• a slow-moving neutron

• a hydrogen nucleus

Tags

NGSS.HS-PS1-8

What is the relative charge of an alpha particle?

• -1

• 0

• 1

• 2

Select all of the properties of alpha particles.

• Highly ionisation

• Highly penetrating

• Weakly ionising

• Weakly penetrating

Tags

NGSS.HS-PS1-8

An alpha particle can be stopped by (a)   .

In alpha decay, the mass number...

• increases by 2

• decreases by 2

• increases by 4

• decreases by 4

Tags

NGSS.HS-PS1-8

In alpha decay, the atomic number...

• increases by 2

• decreases by 2

• increases by 4

• decreases by 4

Tags

NGSS.HS-PS1-8

The mass number of Neptunium (Np) is (a)   .

The atomic number of Neptunium (Np) is (a)   .

Explain how alpha decay is used in smoke detectors.