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particle in the nucleus with no electrical charge
neutron
particle with a negative electric charge
electron
small particle that makes up much matter
atom
anything that takes up space and has mass
matter
mixture
two or more substances that are not a compound
what does the periodic table do?
organizes elements according to the number of protons
proton has a ____charge
positive
What is a chemical formula?
symbols and numbers that tell what elements are in a compound
What is a compound?
matter made when two or more elements combine to make a new substance
What is a particle accelerator?
a machine that makes synthetic elements
Which item is matter?
light, sound. gravity, sand
Elements are made up of ___ type of matter
1
The chemical formula for carbon dioxide is CO2 How many molecules of oxygen are in 4 molecules of carbon dioxide?
8
Which particle is the lightest found in an atom?
electron, proton, neutron, nucleus
What is a heterogeneous mixture?
two or more substances that are combined but not dissolved; can be separated into its original parts
atom-beryllium; atomic number, atomic mass, protons, neutrons, electrons
atomic number 4; atomic mass 9; protons 4; neutrons 5; electrons 4
