Name two elements that exist in the form of atoms.
Hence, Argon and Krypton are the two examples of gases in which the smallest particle is an atom.
An element E exists in three allotropic forms A, B and C. In allotrope A, the atoms of element E are joined to form spherical molecules. In allotrope B, each atom of element E is surrounded by three other E atoms to form a sheet-like structure. In allotrope C, each atom of element E is surrounded by four other E atoms to form a rigid structure. (a) Name the element E. (b) What is allotrope A? (c) What is allotrope B? (d) What is allotrope C? (e) Which allotrope is used in making jewellery? (f) Which allotrope is used in making the anode of a dry cell?
Name two elements that exist in the form of molecules.
Name 2 elements which exist as independent atoms.