Which of the following particles is found in the nucleus of an atom?
Neutron
proton and neutron
proton
Electron
What charge does an electron have?
positive
Neutral
Negative
none of the above
Which of these particles has no electrical charge?
proton
electron
neutron
none of the above
Who proposed the atomic model with a nucleus and electrons surrounding it?
Niels Bohr
James Chadwick
Ernest Rutherford
J.J. Thompson
In which atomic model are electrons embedded within a positively charged "pudding"?
Thompson's model
Bohr's model
Modern quantum model
Rutherford's model
What was the primary conclusion of Rutherford's gold foil experiment?
Electrons are scattered randomly in a positive sphere
atom is mostly empty space with a dense + charged nucleus
Atoms are indivisible particles.
The mass of an atom is evenly distributed.
Which statement is true about the mass of subatomic particles?
Electrons have more mass than protons.
Neutrons have less mass than electrons.
Electrons have less mass than protons.
Protons have less mass than electrons.
Which particle has a positive charge?
Electron
None of the above
Neutron
Proton
In Rutherford's gold foil experiment, most alpha particles passed straight through the foil. What did this observation suggest?
Electrons are in fixed orbits.
Atoms have a lot of empty space.
Atoms are densely packed with particles.
Atoms have a lot of empty space.
Which scientist’s model suggested that electrons orbit the nucleus in specific energy levels?
J.J. Thompson
James Chadwick
Niels Bohr
Ernest Rutherford
how much water vapour there is in the atmosphere
humidity
temperature
rain, hail or snow which falls from clouds
humidity
precipitation
how far you can see, it depends on the atmospheric conditions or darkness
visibility
temperature
