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Cameran Jenkins CW

Horizontales
Tells the number of protons an element has
Substances composed of only one type of atom
The densest element.
Used to measure mass
Where the electrons are
Tiny particles that all matter is made of
The center of an atom.
Negatively charged subatomic particles
The amount of matter in one unit volume (space)
The measure of the pull of gravity on an object
Neutrally charged subatomic particles
Verticales
The first column on the periodic table
The study of what substances are made of
Have 8 valence electrons (will not bond with other elements)
Has a single proton and a single electron
Positively charged subatomic particles
Substances composed of more than one type of atom
Mixture of metals
The amount of matter that makes up an object
The maximum number of electrons the 2nd shell can hold
Makes up 78% of the air we breathe