Sodium (na) and potassium (k) are in the same group in the periodic table. sodium is in the 11th position. how many valence electrons does potassium have? a) 0 b) 1 c) 9 d) 11

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

What is the correct term for living the most sustainable life you can within your current circumstances?