Positively charged and is found in the nucleus.
Proton
Measure of the number of atoms.
Mass
Determines how many valence electrons an element has.
Groups
Create products.
Reactants
No charge and is found in the nucleus.
Neutron
Consists of protons and neutrons.
Nucleus
Elements in the same ______________ have similar properties.
Periods
Made from reactants.
Products
Negatively charged and are found in the electron cloud.
Electron
Electrons are found on here.
Electron cloud
Determine if an element is highly reactive or not.
Valence electrons