Conservation Laws

In the standard model, the particle considered to be an elementary particle is a(n)

• proton
• neutron
• electron
• alpha particle

All atoms consist of mostly empty space.

• True
• False

All of the following are quarks except

• strange

• bottom

• charmed

• spark

A proton is made up of two up quarks and one down quark with charges of +2/3, +2/3, and –1/3. 

• True 
• False
• More information is needed

These are light, elementary particles that are not made up of quarks.

• Gluons

• Electrons

• Leptons

• Baryon

These are the category of hadrons that contain three quarks. This distinguishes them from mesons, which contain two (1 quark and 1 antiquark).

• Gluons

• Electrons

• Leptons

• Baryons

All baryons are assigned a baryon number of ___, all anti-baryons are assigned ___, and all non-baryons are ___

• -1, +1, 0

• -1, 0, +1

• +1, -1, 0

• 0, -1, +1

All leptons are assigned a lepton number of ___, all anti-leptons are assigned ___, and all non-leptons are ___

• -1, +1, 0

• -1, 0, +1

• +1, -1, 0

• 0, -1, +1

There are three families of leptons;

• electron, muon, and pi.

• electron, muon, and tau.

• electron, pi and tau.

• electron, pi and neutrino.

The main three conservation laws used in particle physics are:

• Conservation of charge, baryon and lepton numbers.

• Conservation of gravity, charge and lepton numbers.

• Conservation of momentum, hadron and lepton numbers.

• Conservation of charge, hadron and lepton numbers.

Tags

NGSS.HS-PS2-2