Question

There are six elements in Group 14 on the Periodic Table. One of these elements has the symbol Uuq, which is a temporary, systematic symbol. This element is now known as flerovium.
66 Identify an element in Group 14 that is classified as a metalloid. [1]
67 Explain, in terms of electron shells, why each successive element in Group 14 has a larger atomic radius, as the elements are considered in order of increasing atomic number. [1]
68 State the expected number of valence electrons in an atom of the element flerovium in the ground state. [1]

Answer 1

Silicon and germanium are metalloids. Atomic radius increases because there are more electron shells. Four valence electrons.