What are all substances made of?
What is a column of the periodic Table called?
What is a row on the periodic table called?
What are the names of the 3 subatomic particles?
P
E
N
What subatomic particles are found in the nucleus?
What subtatomic particles are found in the shells?
How many protons does beryllium have?
How many electrons does beryllium have?
How many neutrons does beryllium have?
Bromine is in Group 7. How many electrons are in the outer shell of a bromine atom?