Atoms and nuclear radiation
Quiz by Horia
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- Q1
State the average radius of an atom
1x 10-10m
1x10-14m
30s - Q2
What is the atomic number?
Number of protons
Number of neutrons
Number of electrons
30s - Q3
Define isotope
Atoms with the same atomic number but different number of neutrons
Atoms with the same number of protons but different number of electrons
Atoms with the same number of neutrons but different number of protons
30s - Q4
Where is the mass of an atom?
Concentrated in the centre
Distributed evenly
30s - Q5
What is the location of electrons in an atom
Distributed evenly
Specific distances from the nucleus
30s - Q6
State the relative mass of a proton, neutron and electron
1, 0, 1/1836
1, 1, 1/1836
+1, 0, -1
30s - Q7
State the relative charge of a proton, neutron and electron
+1, +1, -1
+1, 0, -1
-1, 0, +1
30s - Q8
What is the atomic mass number
Total number of protons + electrons
Total number of neutrons - protons
Total number of protons + neutrons
30s - Q9
What happens when an electron absorbs EM radiation?
It moves to a higher energy level further from the nucleus
It moves to a lower energy level closer to the nucleus
30s - Q10
What happens to an electron when it emits EM radiation?
It moves to a higher energy level further to the nucleus
It moves to a lower energy level closer to the nucleus
30s - Q11
Which atomic model did the alpha particle scattering experiment lead to?
Nuclear model
Plum pudding model
Bohr model
30s - Q12
Who discovered the neutron?
James Chadwick
John Dalton
J.J. Thompson
30s - Q13
Why are some samples radioactive?
The nuclei are small
They contain too many nuclei
They contain unstable nuclei
30s - Q14
How would you describe the nature of radioactive decay?
Hazardous and predictable
Random and unpredictable
30s - Q15
Name 3 types of radiation caused by spontaneous decay of nuclei
alpha, beta, gamma
alpha, beta, neutrons
30s