Q.1
The mass of this particle is so small that it is not counted.
  • proton
  • electron
  • neutron
  • quark
Q.2
The atomic mass of Helium is
  • 1.008
  • 4.003
  • 15.999
  • 9.001
Q.3
The atomic mass of Hydrogen is
  • 1.008
  • 4.003
  • 15.999
  • 8.001
Q.4
Protons and neutrons is so small, they are assigned a mass of 1 in these units
  • grams
  • milligrams
  • amu (atomic mass unit)
  • mass number
Q.5
The atom 714𝑁has a mass of 14.𝑒.The mass defect equals ______.
  • 0.1089 u
  • 0.2026 u
  • 0.2341 u
  • 0.0003 u
Q.6
The mass ofis𝑒 where;= 1.* 10-27π‘˜π‘”. This mass is equal to:
  • The mass of 12C nucleus
  • The mass of 12C nucleus plus 6 electrons
  • The mass of 12C nucleus plus 12 electrons
  • The mass of 6 protons and 6 neutrons
Q.7
When nucleons form stable nucleus, bindingenergy is _______.
  • created from nothing
  • destroyed into nothing
  • absorbed as high energy photons orparticles
  • released as high energy photons or particles
Q.8
Which of the following statements is/are correctregarding the binding energy of the nucleus.I. It is equivalent to the mass defectII. It is the energy that holds the nucleustogetherIII. It is the energy required to remove aproton from the nucleus
  • I only
  • II only
  • III only
  • I and II only
Q.9
As the binding energy of a nucleus increases, theenergy required to separate the nucleus intonucleons _____.
  • decreases
  • increases
  • stays the same
  • becomes negative to positive
Q.10
The energy equivalent in joules of the mass of2.0 *10-π‘˜π‘” _____.
  • 2.0 *10-31𝐽
  • 6.0 *10-23 𝐽
  • 1.8 * 10-14𝐽
  • 8.2 * 10-14 𝐽
Q.11
Mass of 6 electrons is ________ amu.
  • 0
  • 1
  • 2
  • 3
Q.12
Mass of 5 protons is _________ amu.
  • 1
  • 2
  • 4
  • 5
Q.13
Mass of protons equals to _________. amu.
  • 0
  • 1
  • 2
  • All of above
Q.14
The Carbon-atom is used by physicists to establish
  • the charge on an electron.
  • the low point on a mass defect graph.
  • the gram and kilogram units.
  • the atomic mass unit.
Q.15
Choose the answer that correctly describes Iron.
  • Iron has a heavier atom than carbon and a heavier proton also.
  • Iron has a heavier atom than gold but a lighter proton
  • Iron has a lighter atom than lead and a lighter proton also.
  • All three statements are equally correct.
Q.16
Main sequence stars of all masses are fusing what element to make helium
  • hydrogen
  • iron
  • gold
  • beryllium
Q.17
When protons and neutrons combine to form a nucleus , mass of the nucleus will be
  • Equal to the mass of protons and neutrons before combining
  • Greater than mass of protons and neutrons before combining
  • less than mass of protons and neutrons before combining
  • All of above
Q.18
What happens to the extra .of matter that is left over when hydrogen is fused into helium?
  • nothing it just stays in the star
  • released as energy
  • there is no left over matter
  • stars are dumb
Q.19
Mass of protons is _________ amu.
  • 1
  • 2
  • 0
  • All of above
Q.20
Mass of electrons equals to ______. amu.
  • 0
  • 1
  • 2
  • 3
0 h : 0 m : 1 s