Loading…
Loading…
GCSE Chemistry · key term
Mass per unit volume.
Used by AQA, Edexcel and OCR
Specification 4.1.3.1 · Paper 1
Mass per unit volume. A denser material contains more mass in the same volume.
Revise: Comparison with Alkali MetalsTransition metals also generally have higher densities. Density compares mass with volume, so an equal-sized piece of a transition metal will usually have more mass than a piece of a Group 1 metal. Lithium, sodium and potassium have particularly low densities; each is less dense than water and therefore floats on it.
Specification 1.42, 5.1C, 5.7C, 6.15, 6.16, 9.39C · Paper 1, Paper 2
Mass per unit volume; a high-density substance has a relatively large mass for its volume.
Revise: Metals vs Non-metals PropertiesAppearance, state, melting point, boiling point, density and electrical conductivity are all physical properties.
Mass per unit volume; a low-density material has relatively little mass for its size.
Mass per unit volume, calculated by dividing mass by volume.
Mass per unit volume; a less dense gas has less mass in the same volume.
The mass of a substance per unit volume.
Mass per unit volume of a substance.
Specification C4.1c, C6.1r, C6.1s · Paper 2 (Foundation), Paper 4 (Higher)
The mass of a substance per unit volume.
Revise: Transition MetalsTransition metals generally have high melting points and high densities, especially compared with Group 1 metals. Melting point is the temperature at which a solid becomes a liquid; density tells you how much mass is packed into a given volume. Transition metals are also usually hard and strong.
Mass per unit volume, usually measured in kg/m³ or g/cm³.
The amount of mass in a given volume of a material; a lower-density material can make a product lighter.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Mass per unit volume of a substance.
Revise: Metals vs non-metalsGroup 1 metals also show why comparisons must be qualified: they have relatively low melting points and low densities for metals.
Mass per unit volume; it measures how much mass is contained in a given volume.
The mass per unit volume of a material.
Mass per unit volume, calculated using .
Make every comparison directional: write that transition metals have higher melting points or densities than Group 1 metals, rather than merely saying that the values are “different”.
Give all four typical properties when asked: high melting point, high density, coloured compounds and catalytic activity.
For a prediction, locate the element in Group 0 first, then state whether its boiling point or density should be higher or lower than those of its neighbours.
Create a free account to read GCSE Chemistry revision notes for your exam board and track your progress.