BTEC Applied Science Unit 1, Assignment C (FULL
ASSIGNMENT) Exam 2025–2026 Accurate Real
Exam Questions and Verified Correct Answers
How many electrons can an s subshell hold? - answer-2
How many electrons can a p subshell hold? - answer-6
How many electrons can a d subshell hold? - answer-10
Which subshells are available in the first energy level? - answer-s
Which subshells are available in the second energy level? - answer-s and p
Which subshells are available in the third energy level? - answer-s, p and d
Why do metals have such high melting points? - answer-Strong force of
attraction between positive ions and delocalised electrons. This requires a
large amount of energy to overcome.
State the two factors that affect the strength of metallic bonding - answer-Size
of ion
Charge on ion
,Explain how the charge on metal ions affects the strength of the metallic bond
- answer-The larger the +ve charge the greater the attraction between the
nucleus and the delocalised electrons
Explain how the size of the metal ions affects the strength of the metallic bond
- answer-The smaller the +ve ion the closer the nucleus is to the delocalised
electrons creating a greater attraction
Explain why metals conduct electricity - answer-The delocalised electrons
'carry' charge. Current flows because of this.
Explain why metals conduct heat - answer-Particles are paced tightly so kinetic
energy is passed from ion to ion. The delocalised electrons also enable heat to
be passed.
Explain why metals are ductile and malleable - answer-The lattice structure
allows layers of metal ions to slide over each other without disrupting bonding
Name the 3 forces between molecules - answer-Van der Waals
Permanent dipole-dipole
Hydrogen bonds
Order the 3 forces between molecules in order of strongest to weakest -
answer-Hydrogen bonds
Permanent dipole-dipole
Van der Waals
,How are Van der Waal's forces formed? - answer-Electrons move to one side,
caused temporary dipole. This induces a temporary dipole in neighbouring
molecules. Attraction occurs between oppositely charged dipoles
In what molecules do Van der Waal's forces exist? - answer-Non-polar
molecules
How are permanent dipole-dipole forces formed? - answer-Permanent dipole
in one molecule attracts oppositely charged permanent dipole in neighbouring
molecule
In which molecules do permanent dipole-dipole forces exist? - answer-Polar
molecules
Which elements must be present for hydrogen bonds to exist? - answer-
Hydrogen and either nitrogen, oxygen or fluorine
What is meant by the term displacement? - answer-When a more reactive
element takes the place of a less reactive element in a compound
State the equation for determining moles - answer-Moles = mass ÷ relative
atomic mass (molar mass)
Define the term Avogadro's Constant - answer-The number of atoms in a mole
of a given substance. Quoted as 6.02x10^23
, Define the term relative atomic mass - answer-The average mass of an atom of
an element relative to 1/12th the relative atomic mass of Carbon12
What is Hund's rule? (Think bus seats!) - answer-Orbitals must all be singly
filled before they can be doubly occupied
Which elements do not fill the 4s subshell before the 3d subshell? - answer-
Copper and chromium
Define the term ionic bond - answer-The electrostatic attraction between
oppositely charged ions
What is the charge of an ion from group 1? - answer-+1
What is the charge of an ion from group 2? - answer-+2
What is the charge of an ion from group 6? - answer--2
What is the charge of an ion from group 7? - answer--1
Explain how atoms of sodium react with atoms of chlorine - answer-Na loses its
2s1 electron gaining a +ve charge.
Cl gains an electron in the 3p subshell gaining a -ve charge.
ASSIGNMENT) Exam 2025–2026 Accurate Real
Exam Questions and Verified Correct Answers
How many electrons can an s subshell hold? - answer-2
How many electrons can a p subshell hold? - answer-6
How many electrons can a d subshell hold? - answer-10
Which subshells are available in the first energy level? - answer-s
Which subshells are available in the second energy level? - answer-s and p
Which subshells are available in the third energy level? - answer-s, p and d
Why do metals have such high melting points? - answer-Strong force of
attraction between positive ions and delocalised electrons. This requires a
large amount of energy to overcome.
State the two factors that affect the strength of metallic bonding - answer-Size
of ion
Charge on ion
,Explain how the charge on metal ions affects the strength of the metallic bond
- answer-The larger the +ve charge the greater the attraction between the
nucleus and the delocalised electrons
Explain how the size of the metal ions affects the strength of the metallic bond
- answer-The smaller the +ve ion the closer the nucleus is to the delocalised
electrons creating a greater attraction
Explain why metals conduct electricity - answer-The delocalised electrons
'carry' charge. Current flows because of this.
Explain why metals conduct heat - answer-Particles are paced tightly so kinetic
energy is passed from ion to ion. The delocalised electrons also enable heat to
be passed.
Explain why metals are ductile and malleable - answer-The lattice structure
allows layers of metal ions to slide over each other without disrupting bonding
Name the 3 forces between molecules - answer-Van der Waals
Permanent dipole-dipole
Hydrogen bonds
Order the 3 forces between molecules in order of strongest to weakest -
answer-Hydrogen bonds
Permanent dipole-dipole
Van der Waals
,How are Van der Waal's forces formed? - answer-Electrons move to one side,
caused temporary dipole. This induces a temporary dipole in neighbouring
molecules. Attraction occurs between oppositely charged dipoles
In what molecules do Van der Waal's forces exist? - answer-Non-polar
molecules
How are permanent dipole-dipole forces formed? - answer-Permanent dipole
in one molecule attracts oppositely charged permanent dipole in neighbouring
molecule
In which molecules do permanent dipole-dipole forces exist? - answer-Polar
molecules
Which elements must be present for hydrogen bonds to exist? - answer-
Hydrogen and either nitrogen, oxygen or fluorine
What is meant by the term displacement? - answer-When a more reactive
element takes the place of a less reactive element in a compound
State the equation for determining moles - answer-Moles = mass ÷ relative
atomic mass (molar mass)
Define the term Avogadro's Constant - answer-The number of atoms in a mole
of a given substance. Quoted as 6.02x10^23
, Define the term relative atomic mass - answer-The average mass of an atom of
an element relative to 1/12th the relative atomic mass of Carbon12
What is Hund's rule? (Think bus seats!) - answer-Orbitals must all be singly
filled before they can be doubly occupied
Which elements do not fill the 4s subshell before the 3d subshell? - answer-
Copper and chromium
Define the term ionic bond - answer-The electrostatic attraction between
oppositely charged ions
What is the charge of an ion from group 1? - answer-+1
What is the charge of an ion from group 2? - answer-+2
What is the charge of an ion from group 6? - answer--2
What is the charge of an ion from group 7? - answer--1
Explain how atoms of sodium react with atoms of chlorine - answer-Na loses its
2s1 electron gaining a +ve charge.
Cl gains an electron in the 3p subshell gaining a -ve charge.
