WorksheetsStructure of the Atom
Total questions: 10
Worksheet time: 48mins
Bohr discovered that electrons are located in
the nucleus
inside protons
electron cloud
circular orbits around the nucleus
Which scientist discovered the electrons?
Dalton
Thomson
Atristotle
Bohr
The smallest particle of an element that still represents that element.
Nucleus
electron
proton
atom
Neils Bohr's atomic theory is similar to the concept of the
solar system
circles with dots
spinning wheel
None of the above
___________ __________ is the lowest energy level an electron will occupy in an atom at an ordinary condition
ground state
excited state
highest state
none of the above
When an electron absorbs enough energy, it jumps up to a higher level. This is called
absorption state
excitation state
emission state
relaxation state
Rutherford realized that the atomic nucleus was positively charged because
it attracted alpha particles.
it deflected alpha particles.
it had no effect on alpha particles.
it produced alpha particles.
Which of the following is the best evidence that the particles that make up a cathode ray had a negative charge?
The particles were produced by many different metals.
The ray was deflected toward a positive electric field.
Line emission spectra for an element are always the same.
The ray caused a phosphorescent screen to glow.
