Which of the following is a metalloid?
Germanium
Sodium
Chlorine
Neon
Germanium is a metalloid. Sodium is a metal where as chlorine and neon are nonmetals.
(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.
Write the atomic number and electronic configuration of the following elements.
(i) Sodium
(ii) Chlorine
(iii) Neon
(iv) Magnesium