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