NEC51 Particles

Which model of the atom contained electrons in a sea of positive charge?

• Rutherford model
• Plum pudding model
• Bohr model
• Quantum mechanical model

Rutherford's gold foil experiments led to the discovery of the...

• nucleus of the atom
• proton

• electron

• neutron

Which model of the atom is the one that is currently accepted?

• Dalton's model
• Thomson's model

• Rutherford's model

• Bohr's model

How many neutrons are in a uranium-238 atom? (Atomic number = 92)

• 146
• 150
• 92
• 140

Particles subjected to the strong interaction are called...

• hadrons
• bosons
• quarks
• leptons

Fundamental matter particles are called...

• quarks
• bosons
• fermions
• leptons

Protons and neutrons are...

• hadrons

• nucleons

• baryons

• mesons

How many quarks do baryons have?

• 3
• 2
• 1
• 4

What arrangement of quarks do protons have?

• Two up quarks and one down quark (uud)
• Three up quarks (uuu)
• One up quark and two down quarks (udd)
• Two down quarks and one up quark (ddu)

Elementary particles that do not undergo strong interactions are called...

• quarks
• bosons
• leptons
• hadrons