1 MATTER AND RADIATION - AQA A-LEVEL PHYSICS
QUESTIONS WITH 100% CORRECT ANSWERS .
The Four Fundamental Forces of Nature ANS -The strong nuclear force, The electromagnetic force, The
weak nuclear force, Gravity.
3.2.1.1 Inside the atom ANS --Describe what is inside an atom.
-Explain the term isotope.
-Represent different atoms.
Study tip 1 ANS -Don't mix up 'n' words - nucleus, neutron, nucleon, nuclide!
Every atom contains ANS --A positively charged nucleus composed of protons and neutrons.
-Electrons that surround the nucleus.
The word nucleon is used as ANS -A word for a proton or neutron in the nucleus.
Inside the atom table ANS -Page 4.
-Protons = + charge and found in the nucleus
-Neutrons = NO charge and found in the nucleus
-Electrons = - charge and found in the electron cloud
Inside the atom diagram ANS -
SI Units for atoms ANS --Charge: Coulombs
-Mass: Kilograms
Proton number is also called ANS -The atomic number (symbol z)
for example:
, z = 6 for Carbon because every Carbon atom has six protons in its nucleus
z = 92 for Uranium because every Uranium atom has 92 protons in its nucleus
Isotopes ANS -Atoms with the same number of protons but different numbers of neutrons.
for example:
The most abundant isotope of natural uranium contains 146 neutrons and the next most abundant
contains 143 neutrons.
The total number of protons and neutrons in an atom ANS -is called the nucleon number (symbol A) or
sometimes the mass number of the atom. This is because it is almost numerically equal to the mass of
the atom in relative units (where the mass of a proton or neutron is approximately 1).
Nucleon ANS -A neutron or a proton (subatomic particle) in the nucleus.
Subatomic particle ANS -A particle smaller than an atom: articles found within the atom, mainly
protons, neutrons, and electrons.
Isotope notation ANS -
Isotope notation example ANS -Iron atom 56 26Fe. Names: iron-56, Fe-56.
From the designation we can see that the atomic number to the left of the chemical symbol is 26, so
there are 26 protons in the nucleus. So it has 30 neutrons (56-26).
Specific charge ANS -The specific charge of a charged particle is defined as its charge divided by its
mass. We can calculate the specific charge of a charged particle if we know the charge and the mass of
the particle.
Specific Charge Equation ANS -
Scientific notation ANS -A method of writing or displaying numbers in terms of a decimal number
between 1 and 10 multiplied by a power of 10.
QUESTIONS WITH 100% CORRECT ANSWERS .
The Four Fundamental Forces of Nature ANS -The strong nuclear force, The electromagnetic force, The
weak nuclear force, Gravity.
3.2.1.1 Inside the atom ANS --Describe what is inside an atom.
-Explain the term isotope.
-Represent different atoms.
Study tip 1 ANS -Don't mix up 'n' words - nucleus, neutron, nucleon, nuclide!
Every atom contains ANS --A positively charged nucleus composed of protons and neutrons.
-Electrons that surround the nucleus.
The word nucleon is used as ANS -A word for a proton or neutron in the nucleus.
Inside the atom table ANS -Page 4.
-Protons = + charge and found in the nucleus
-Neutrons = NO charge and found in the nucleus
-Electrons = - charge and found in the electron cloud
Inside the atom diagram ANS -
SI Units for atoms ANS --Charge: Coulombs
-Mass: Kilograms
Proton number is also called ANS -The atomic number (symbol z)
for example:
, z = 6 for Carbon because every Carbon atom has six protons in its nucleus
z = 92 for Uranium because every Uranium atom has 92 protons in its nucleus
Isotopes ANS -Atoms with the same number of protons but different numbers of neutrons.
for example:
The most abundant isotope of natural uranium contains 146 neutrons and the next most abundant
contains 143 neutrons.
The total number of protons and neutrons in an atom ANS -is called the nucleon number (symbol A) or
sometimes the mass number of the atom. This is because it is almost numerically equal to the mass of
the atom in relative units (where the mass of a proton or neutron is approximately 1).
Nucleon ANS -A neutron or a proton (subatomic particle) in the nucleus.
Subatomic particle ANS -A particle smaller than an atom: articles found within the atom, mainly
protons, neutrons, and electrons.
Isotope notation ANS -
Isotope notation example ANS -Iron atom 56 26Fe. Names: iron-56, Fe-56.
From the designation we can see that the atomic number to the left of the chemical symbol is 26, so
there are 26 protons in the nucleus. So it has 30 neutrons (56-26).
Specific charge ANS -The specific charge of a charged particle is defined as its charge divided by its
mass. We can calculate the specific charge of a charged particle if we know the charge and the mass of
the particle.
Specific Charge Equation ANS -
Scientific notation ANS -A method of writing or displaying numbers in terms of a decimal number
between 1 and 10 multiplied by a power of 10.
