What's the symbol for metalloid with 6 valence electrons? my question was to "write the symbol for a metalloid with 6 valence electrons" and i'm a bit confused !

Te and Po are both matelloids with 6 valence electron.
How do you know?
Families (columns) are named after their valence electrons, so if u count 1A 2A 3A 4A 5A 6A 7A 8A (from left to right on the periodic table IGNORING the transition metals, the d block) when u reach the 6A family just look for the matelloids (most periodic tables show the matelloids)
Hope this helped!

The correct answer is a

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.