Question Answer
Atom The smallest component of an element having the chemical properties of the element.
Proton Positive
Neutron Neutral
Electron Negative
Nucleus Where protons and neutrons are stored.
Electron Cloud Where the electrons are stored.
Valence Electron A group of electrons revolving around the nucleus of an atom.
Periodic Table of Elements A group of elements shown in rows and periods.
Reactivity How two atoms react to each other.
Atomic Number The number of positive charges in the nucleus of an atom.
Mass Number The rounded number of the Atomic Weight.
Atomic Mass The mass of an element of the Periodic Table.
Element A substance that cannot be separated into a simpler substance.
Science Unit 2 vocab

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