Quiz
Physics: atomic structure and radioactivity
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Perguntas do quiz (22)
1The radius of an atom is 1 x 10(-10) and the nucleus is about 1/10000 of this
- AVerdadeiro
- BFalso
2Electrons can change energy levels when an atom [blank_start]absorbs[blank_end] electromagnetic radiation so the electrons moves from a [blank_start]lower[blank_end] energy level to a [blank_start]higher[blank_end] on. If the atom [blank_start]emits[blank_end] electromagnetic radiation so the electron returns to its [blank_start]original[blank_end] energy level
- Ahigher
- Boriginal
- Clower
- Dabsorbs
- Eemits
3What does the mass number represent?
- AProtons and Neutrons
- BProtons and Electrons
- CNeutrons
- DElectrons
- EProtons
4Isotopes are the same element but with a different number of [blank_start]neutrons [blank_end]
- Aneutrons
5Ancient Greeks->1897->Plum pudding model->Alpha scattering experiment->Nuclear model->Niels Bohr->James Chadwick
- AVerdadeiro
- BFalso
6Some isotopes have an [blank_start]unstable[blank_end] nucleus so to become [blank_start]stable[blank_end] the nucleus gives out [blank_start]radiation[blank_end] - radioactive decay ( a [blank_start]random[blank_end] process)
- Aunstable
- Bstable
- Cradiation
- Drandom
7The rate at which a source of [blank_start]unstable[blank_end] nuclei [blank_start]decay[blank_end]. Which is measured using a [blank_start]Geiger[blank_end]-muller tube.
- Aunstable
- Bdecay
- CGeiger
8Alpha particles—>
- A2 protons + 2 neutrons
- BAn electrons which is ejected form the nucleus at a very high speed and formed in the nucleus when a neutron changes into a proton and an electron
- CA type of electromagnetic radiation from the nucleus
- DA neutron
9Beta particle—>
- A2 protons + 2 neutrons
- BAn electron which is ejected from the nucleus at a very high speed. Formed inside the nucleus when a neutron changes into a proton and an electron
- CA type of electromagnetic radiation from the nucleus
- DA neutron
10Gamma radiation—>
- A2 protons + 2 nucleus
- BAn electron which is ejected from the nucleus at a very high speed. Formed inside the nucleus when a neutron changes into a proton and an electron.
- CA type of electromagnetic radiation from the nucleus
- DNeutron
11Nuclear equations- alpha decay, atomic number decreases by [blank_start]2[blank_end] and the mass number by [blank_start]4[blank_end]
- A2
- B4
- C1
- D4
- E6
- F1
- G2
12Nuclear equations- Beta decay, the atomic number [blank_start]increases[blank_end] by [blank_start]1[blank_end] and the [blank_start]mass[blank_end] number doesn’t change
- Aincreases
- Bdecreases
- C1
- D2
- E4
- Fmass
- Gatomic
13Half life- the time it takes for the count rate or activity (number of decay per second) from a sample contains the isotope to fall to half its initial level.
- AVerdadeiro
- BFalso
14Radiation cannot be ionising (form charge ions)
- AVerdadeiro
- BFalso
15[blank_start]Irradiation[blank_end] is exposing an object to nuclear radiation like [blank_start]sterilisation[blank_end] which uses [blank_start]gamma[blank_end] radiation.
- AIrradiation
- Bsterilisation
- Cgamma
16Ionising radiation decreases the risk of cancer
- AVerdadeiro
- BFalso
17Precautions when using ionising radiation include...
- AShielding- gloves can protect against alpha radiation and beta and gamma radiation can be reduced a lead apron.
- BMonitoring
- CExposure
18Alpha radiation is [blank_start]strongly[blank_end] ionising. It can be stopped by dead skin cells and alpha emitters can be dangerous if inhaled or swallowed.
- Astrongly
- Bless
- Cweakly
19Beta radiation is [blank_start]less[blank_end] ionising. It can penetrate skin.
- Aless
- Bstrongly
- Cweakly
20Gamma radiation is [blank_start]weakly[blank_end] ionising. Can penetrate the body but likely to pass through.
- Aweakly
- Bless
- Cstrongly
21A tracer must...
- APass out of the body and be detected (gamma or beta)
- BNot be strongly ionising to minimise damage to body tissue (gamma)
- CNot decay into another radioactive isotope
- DHave a short half life so it is not present in the body for too long
22Gamma rays through radiotherapy can pass into the body and destroy a tumour
- AVerdadeiro
- BFalso
Informações
- Descrição
- Quiz on Physics: atomic structure and radioactivity , created by Robyn Stevenson on 21/03/2018.
- Autor
- Robyn Stevenson
- Idioma
- English
- Visualizações
- 42
- Etiquetas
- Avaliação
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