* Valence Electrons: These are the electrons in the outermost shell of an atom, which are involved in chemical bonding.

* 6th Shell: This refers to the sixth energy level in an atom's electron configuration.

To find the element with 4 valence electrons in the 6th shell, we need to look at the periodic table:

1. Locate the 6th Period: The 6th period (row) of the periodic table contains elements that have their outermost electrons in the 6th shell.

2. Group 14 (IVA): Elements in Group 14 (IVA) have 4 valence electrons.

3. Element: The element in Group 14 and the 6th period is Lead (Pb).

Therefore, Lead (Pb) has 4 valence electrons in the 6th shell.