2746419
Descrição
Mapa Mental por novaxautumnz, atualizado more than 1 year ago
|
Criado por novaxautumnz
quase 9 anos atrás
|
|
radio activity
- elements that described using
atomic mass munbers
- the mass (nucleon) number
= the number of protons and
neutrons
- 16
- O
- 8
- the
atomic
(proton)
number
=
number
of
protons
- the nucleus of an
atom contains
protons and
neutrons
- different numbers of
protons on their
nucleus
- different numbers of
protons on their
nucleus
- the nucleus of an
atom contains
protons and
neutrons
- the
atomic
(proton)
number
=
number
of
protons
- 8
- O
- 16
- the mass (nucleon) number
= the number of protons and
neutrons
- alpha particles are
helium nuclei
- alpha particles are made up
of two protons and two
neutrons.
- compared to beta and gamma, they are big
and heavy and slow-moving.
- they have a strong
positive charge
- they are strongly
ionising. this means
they can remove
electrons from lots of
atoms, making lots of
ions.
- they dont
penetrate far into
materials - they're
stopped quickley
- alpha particles are made up
of two protons and two
neutrons.
- beta particles are electrons
emitted from a nucleus
- 0
- e
- -1
- -1
- e
- beta particles are
electrons so they move
quite fast and are quite
small
- they have a negative charge
- they are fairly ionising
- they penetrate quite far into materials before being stopped - they travel further than alpha particles
- 0
- gamma rays are a type of electromagnetic radiation
- gamma rays are high energy
waves from electromagnetic
spectrum
- they are weekly
ionising
- they penetrate a long way
into materials
- gamma rays are high energy
waves from electromagnetic
spectrum
- the three types of
radiation can be blocked
- alpha particles are
blocked by paper and
cardboard
- beta particles are blocked
by thin aluminum
- gamma rays are blocked
by thick lead
- alpha particles are
blocked by paper and
cardboard
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