Which row in the table is correct for the properties of alpha ( $α\alpha$ ), beta-minus ( $β−\beta^-$ ), and gamma ( $γ\gamma$ ) radiation?

	Property	$α\alpha$	$β−\beta^-$	$γ\gamma$

Typical penetration | Stopped by thin paper | Stopped by thin paper | Stopped by 3 mm aluminium

Charge (in units of elementary charge $e$ ) | $+ 2$ | $- 1$ | $0$

Deflection in electric field | Towards negative plate | Towards negative plate | No deflection

Mass (in atomic mass units $u$ ) | $4$ | $0.5$ | $0$

Which row in the table is correct for the properties of alpha ( $α\alpha$ ), beta-minus ( $β−\beta^-$ ), and gamma ( $γ\gamma$ ) radiation?

	Property	$α\alpha$	$β−\beta^-$	$γ\gamma$

Typical penetration | Stopped by thin paper | Stopped by thin paper | Stopped by 3 mm aluminium

Charge (in units of elementary charge $e$ ) | $+ 2$ | $- 1$ | $0$

Deflection in electric field | Towards negative plate | Towards negative plate | No deflection

Mass (in atomic mass units $u$ ) | $4$ | $0.5$ | $0$

Radioactivity (A-level only)

Radioactivity (A-level only) Questions