Differences between the properties of metals and non-metals
5 marks · HardThe elements magnesium and sulfur have very different properties. Answer the following questions about them.
State two typical physical properties that distinguish metals from non-metals.
For each of the properties stated in part (a), describe how magnesium and sulfur show these properties.
Name one exception to a typical physical property of metals or non-metals and give a specific example.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) Any two: malleability, shininess, conductivity, high melting point (for metals) vs. brittleness, dullness, low melting point (for non-metals) · must show Two clear properties distinguishing metals and non-metals
(b) E.g. Magnesium (metal) is malleable and shiny; sulfur (non-metal) is brittle and dull. · must show Each property correctly stated for Mg and S
(c) Exception: Mercury is a metal that is liquid at room temperature. Or: Graphite is a non-metal that conducts electricity. · must show Clearly named exception and corresponding example
Common mistakes: Giving only one property; Mixing up properties between magnesium and sulfur; Not naming a valid exception or example
Show mark scheme and worked solution
Marking points
B1a (a) · 1 mark · States one correct physical property difference (e.g., malleable vs. brittle).
B2a (a) · 1 mark · States a second correct property difference.
B1b (b) · 1 mark · Correctly describes magnesium for property 1 and sulfur for property 1. (follow-through)
B2b (b) · 1 mark · Correctly describes magnesium for property 2 and sulfur for property 2. (follow-through)
B1c (c) · 1 mark · States one valid exception and gives a correct example.
Worked solution
a) Two typical physical properties are: 1. Metals are malleable, non-metals are brittle; 2. Metals are shiny when polished, non-metals are dull.
b) Magnesium is malleable and shiny, as is typical of metals. Sulfur is brittle and dull, as is typical of non-metals.
c) An exception is mercury, which is a metal but is liquid at room temperature. Another example: graphite (non-metal) conducts electricity.