Alpha Decay

In alpha decay, the atomic number...

• increases by 2

• decreases by 2

• increases by 4

• decreases by 4

Tags

NGSS.HS-PS1-8

Describe the structure of an alpha particle.

• a fast-moving electron

• 2 protons and 2 neutrons

• a slow-moving neutron

• a hydrogen nucleus

Select all of the properties of alpha particles.

• Highly ionisation

• Highly penetrating

• Weakly ionising

• Weakly penetrating

In alpha decay, the mass number...

• increases by 2

• decreases by 2

• increases by 4

• decreases by 4

Tags

NGSS.HS-PS1-8

What is emitted during the alpha decay of Radium-222 (Ra-222)?

• Helium-4 (He-4)

• Lead-204 (Pb-204)

• Uranium-236 (U-236)

• Plutonium-240 (Pu-240)

Tags

NGSS.HS-PS1-8

Solve this equation for alpha decay.

₈₈²²⁶Ra --> ___ + ₂⁴He

• ₈₆²²²Rn

• ₈₉²²⁶Ac

• ₈₄²²⁴Po

• ₈₈²²⁵Ra

Tags

NGSS.HS-PS1-8

Solve this equation for alpha decay.

₈₅²⁰⁹At = ___ + ₂⁴He

• ₈₃²⁰⁵Bi

• ₈₆²⁰⁹Rn

• ₈₁²⁰⁷Tl

• ₈₅²⁰⁸At

Tags

NGSS.HS-PS1-8

In alpha decay when the top number decreases by 4, what are you actually losing?

• 2 protons & 2 neutrons

• 4 protons

• 2 protons & 2 electrons

• 2 electrons & 2 neutrons

Tags

NGSS.HS-PS1-8

What is the symbol for an alpha particle?

• β 2He

• α 2He

• γ 1H

• α 1H

Tags

NGSS.HS-PS1-8

If an atom of Americium-231 (Am) goes through alpha decay, what would you have at the end?

• Neptunium-227

• Neptunium-234

• Plutonium-231

• Curium-247

Tags

NGSS.HS-PS1-8