BTEC APPLIED SCIENCE UNIT 1 CHEMISTRY EXAM NEWEST WITH
CORRECT ACTUAL QUESTIONS AND CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
What is Displacement of a wave? - CORRECT ANSWER-How far the quantity that is in
oscillation has moved from its mean (rest) value.
What is the amplitude of a wave? - CORRECT ANSWER-The maximum value of displacement
in the oscillation cycle. Always measured from the mean position.
Explain a wave - CORRECT ANSWER-Waves transfer energy from one point to another without
causing any net movement of material.
What is wavelength? - CORRECT ANSWER-The distance along the wave in its direction of
travel (propagation) between consecutive points where the oscillations are in phase.
What is the wave equation? - CORRECT ANSWER-v = fλ
What is Phase Difference? - CORRECT ANSWER-The difference between two waves of the
same frequency and wavelength where 360degrees represents a single whole cycle.
How do particles behave in a longitudinal wave? - CORRECT ANSWER-The particles are
displaced in the same direction that the wave travels.
How do the particles behave in a transverse wave? - CORRECT ANSWER-In a transverse
wave the displacement is at right angles to the direction of the wave travel.
What are the two parts of a longitudinal wave. - CORRECT ANSWER-Compression (squashed)
Rarefaction (spread out)
,What are the 2 types of wave? - CORRECT ANSWER-Longitudinal
And
Transverse.
What is diffraction? - CORRECT ANSWER-Diffraction is the tendency of a wave to spread out in
all directions.
What is transmission of a wave? - CORRECT ANSWER-The wave energy passing through an
object and mostly continuing forward in the original direction.
What is reflection? - CORRECT ANSWER-Wave energy that bounces of a surface and has its
direction of travel altered by 180degrees
What is an interference pattern? - CORRECT ANSWER-A stationary pattern that can result from
the superposition of waves travelling in different directions provided they are coherent.
How many electrons can an s subshell hold? - CORRECT ANSWER-2
How many electrons can a p subshell hold? - CORRECT ANSWER-6
How many electrons can a d subshell hold? - CORRECT ANSWER-10
Which subshells are available in the first energy level? - CORRECT ANSWER-s
Which subshells are available in the second energy level? - CORRECT ANSWER-s and p
Which subshells are available in the third energy level? - CORRECT ANSWER-s, p and d
What is Hund's rule? - CORRECT 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? - CORRECT ANSWER-
Copper and chromium
Define the term ionic bond - CORRECT ANSWER-The electrostatic attraction between
oppositely charged ions
What is the charge of an ion from group 1? - CORRECT ANSWER-+1
What is the charge of an ion from group 2? - CORRECT ANSWER-+2
What is the charge of an ion from group 6? - CORRECT ANSWER--2
What is the charge of an ion from group 7? - CORRECT ANSWER--1
Explain how atoms of sodium react with atoms of chlorine - CORRECT ANSWER-Na loses its
2s1 electron gaining a +ve charge.
, Cl gains an electron in the 3p subshell gaining a -ve charge.
The opposite charges attract to form NaCl
Why do ionic bonds have such high melting points? - CORRECT ANSWER-Each +ve ion is
surrounded by 6 -ve ions and vice versa.
Strong electrostatic attraction in every direction.
Requires a large amount of energy to break
State two factors that affect the strength of an ionic bond - CORRECT ANSWER-Size of ion and
charge on ion
When can ionic substances conduct electricity? - CORRECT ANSWER-When molten or in
aqueous solution
Describe the properties of ionic compounds - CORRECT ANSWER-Conduct electricity when
molten or aqueous solution
High melting/boiling points
Usually soluble in water
Define the term covalent bond - CORRECT ANSWER-A shared pair of electrons
Which metals lose electrons from the 4s subshell before the 3d subshell? - CORRECT
ANSWER-Transition metals
Why do metals have such high melting points? - CORRECT 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 - CORRECT ANSWER-Size of
ion
Charge on ion
Explain how the charge on metal ions affects the strength of the metallic bond - CORRECT
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 - CORRECT
ANSWER-The smaller the +ve ion the closer the nucleus is to the delocalised electrons
creating a greater attraction
Explain why metals conduct electricity - CORRECT ANSWER-The delocalised electrons 'carry'
charge. Current flows because of this.
CORRECT ACTUAL QUESTIONS AND CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+ 2025 – 2026
What is Displacement of a wave? - CORRECT ANSWER-How far the quantity that is in
oscillation has moved from its mean (rest) value.
What is the amplitude of a wave? - CORRECT ANSWER-The maximum value of displacement
in the oscillation cycle. Always measured from the mean position.
Explain a wave - CORRECT ANSWER-Waves transfer energy from one point to another without
causing any net movement of material.
What is wavelength? - CORRECT ANSWER-The distance along the wave in its direction of
travel (propagation) between consecutive points where the oscillations are in phase.
What is the wave equation? - CORRECT ANSWER-v = fλ
What is Phase Difference? - CORRECT ANSWER-The difference between two waves of the
same frequency and wavelength where 360degrees represents a single whole cycle.
How do particles behave in a longitudinal wave? - CORRECT ANSWER-The particles are
displaced in the same direction that the wave travels.
How do the particles behave in a transverse wave? - CORRECT ANSWER-In a transverse
wave the displacement is at right angles to the direction of the wave travel.
What are the two parts of a longitudinal wave. - CORRECT ANSWER-Compression (squashed)
Rarefaction (spread out)
,What are the 2 types of wave? - CORRECT ANSWER-Longitudinal
And
Transverse.
What is diffraction? - CORRECT ANSWER-Diffraction is the tendency of a wave to spread out in
all directions.
What is transmission of a wave? - CORRECT ANSWER-The wave energy passing through an
object and mostly continuing forward in the original direction.
What is reflection? - CORRECT ANSWER-Wave energy that bounces of a surface and has its
direction of travel altered by 180degrees
What is an interference pattern? - CORRECT ANSWER-A stationary pattern that can result from
the superposition of waves travelling in different directions provided they are coherent.
How many electrons can an s subshell hold? - CORRECT ANSWER-2
How many electrons can a p subshell hold? - CORRECT ANSWER-6
How many electrons can a d subshell hold? - CORRECT ANSWER-10
Which subshells are available in the first energy level? - CORRECT ANSWER-s
Which subshells are available in the second energy level? - CORRECT ANSWER-s and p
Which subshells are available in the third energy level? - CORRECT ANSWER-s, p and d
What is Hund's rule? - CORRECT 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? - CORRECT ANSWER-
Copper and chromium
Define the term ionic bond - CORRECT ANSWER-The electrostatic attraction between
oppositely charged ions
What is the charge of an ion from group 1? - CORRECT ANSWER-+1
What is the charge of an ion from group 2? - CORRECT ANSWER-+2
What is the charge of an ion from group 6? - CORRECT ANSWER--2
What is the charge of an ion from group 7? - CORRECT ANSWER--1
Explain how atoms of sodium react with atoms of chlorine - CORRECT ANSWER-Na loses its
2s1 electron gaining a +ve charge.
, Cl gains an electron in the 3p subshell gaining a -ve charge.
The opposite charges attract to form NaCl
Why do ionic bonds have such high melting points? - CORRECT ANSWER-Each +ve ion is
surrounded by 6 -ve ions and vice versa.
Strong electrostatic attraction in every direction.
Requires a large amount of energy to break
State two factors that affect the strength of an ionic bond - CORRECT ANSWER-Size of ion and
charge on ion
When can ionic substances conduct electricity? - CORRECT ANSWER-When molten or in
aqueous solution
Describe the properties of ionic compounds - CORRECT ANSWER-Conduct electricity when
molten or aqueous solution
High melting/boiling points
Usually soluble in water
Define the term covalent bond - CORRECT ANSWER-A shared pair of electrons
Which metals lose electrons from the 4s subshell before the 3d subshell? - CORRECT
ANSWER-Transition metals
Why do metals have such high melting points? - CORRECT 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 - CORRECT ANSWER-Size of
ion
Charge on ion
Explain how the charge on metal ions affects the strength of the metallic bond - CORRECT
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 - CORRECT
ANSWER-The smaller the +ve ion the closer the nucleus is to the delocalised electrons
creating a greater attraction
Explain why metals conduct electricity - CORRECT ANSWER-The delocalised electrons 'carry'
charge. Current flows because of this.
