A researcher compares four elements, K, L, M and N.
| Element | Melting point (∘C^\circ\mathrm{C}∘C) | Appearance | Conducts electricity? | pH of the solution made when its oxide is added to water |
|---|---|---|---|---|
| K | −39 | shiny, silver | yes | 7 |
| L | 1085 | shiny, reddish-brown | yes | 7 |
| M | 3650 | dull, dark grey | yes | 4 |
| N | 650 | dull, grey | yes | 10 |
Three of the elements are metals and one is a non-metal.
Identify the non-metal.
L
M
N
K
122 exam-style questions on OCR GCSE Chemistry 2.2 Bonding, covering 2.2.1 Metals, non-metals and the Periodic Table, 2.2.2 Types of chemical bonding and dot and cross diagrams, 2.2.3 Limitations of bonding models, and 2.2.4 Reactivity, atomic number and the modern Periodic Table. Each one has a worked solution and a mark scheme showing where the marks go.