Question |
Answer |
anything that has mass and takes up space |
matter |
a material that cannot be broken down into anything simpler |
element |
is the smallest unit of an element that retains the properties of that element |
atom |
the center of an atom |
nucleus |
are particles with one unit of positive electric charge each |
protons |
are particles with no electric charge |
nuetrons |
are smaller particles with one unit of electric of negative electric charge each |
electrons |
are particles with more than one atom joined togther |
molecules |