Atoms and Periodic table Crossword

What column on the periodic table doesn't react with other elements?
What do the periods on the periodic table show?
Who created the periodic table?
What model is used to show atoms?
What is located inside the nucleus, has a positive charge, and has a mass of one Amu?
What is located inside the nucleus, has no charge, and has a mass of one Amu?
What subatomic particles show an elements reactivity?
Elements in which two groups are highly reactive?
What is found outside of a nucleus, and has a negitive charge?
Which subatomic particle determines what element it is?
How many protons does magnesium have?
True or false - Chlorine and lithium are highly reactive elements.
True or false - Elements with full energy shells are highly reactive
How many energy levels does hydrogen have?
What is equal to the number of protons and neutrons combined of an element?
What is equal to the number of protons or electrons in an element?
How many neutrons are in helium?
What is the largest type of element in the periodic table? (Metals, nonmetals, or metalloids)
What is the 20th element's atomic mass?
True or false- the 11th column in the periodic table is not very reactive