Electron energy levels/ group 0 content

In a neutral atom, what’s the same

The number of electrons is the same as the number of protons

What does the number of electrons in the outer energy level tell us

The group number of that element in the periodic table

What do scientists call group 0

The noble gasses

Who produced the original periodic table

Dmitri Mendeleev

Why did Dmitri Mendeleev not feature noble gasses

because noble gasses were not fully discovered until after Mendeleev developed his table

What’s a key fact about noble gasses

they are very unreactive elements

What’s a seconded key fact about noble gasses

all of the noble gasses have a full outer energy level which makes them in reactive

When does the boiling point of Noble gasses increase

as the relative atomic mass increases