What does the periodic table of elements classify (or show)?
Elements with similar chemical properties are in the same ...?
Which element is represented by the symbol 'H' on the periodic table?
What is the smallest unit of an element?
What unique number identifies an element on the periodic table?
What is the center of an atom called?
Which part of an atom is positively charged (+)?
What is the charge of a neutron?
What part of an atom is negatively charged (-)?
All elements are made up of ONLY one type of atom.