Elements can be classified into metals, non-metals and metalloids.
(a) What are metalloids? Name two metalloids.
(b) Classify the following elements into metals,non-metals, and metalloids:
Copper, Sulphur, Aluminium, Oxygen, Silicon, Nitrogen, Germanium, Mercury, Chlorine, and Sodium.
(a) always metals
(b) always non-metals
(c) always metalloids
(d) either metals or non-metals