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Unit B-2 Vocab

state of matter The five states of matter are solids, liquids, gases, plasma, and Bose-Einstein condensates.
solid The atoms in the object are packed tightly together, so that it has a level of resistance to shape change
liquid The atoms of the object are loosely packed together, so that it can change shape, depending on its container
gas The atoms of the object are bouncing off of each other, forming a gas
atom The smallest measurable unit that matter can be broken down into
proton A subatomic particle found in an atom's nucleus with a positive electric charge
neutron A subatomic particle found in an atom's nucleus with no electrical charge, present in all atomic nuclei besides those of ordinary hydrogen
nucleus The central core of an atom containing protons and neutrons
electron A subatomic particle with a negative charge
electron cloud Describes where electrons are when they go around the nucleus of an atom.
valence electron An electron in the outer shell of an atom that can form chemical bonds with other atoms
Periodic Table of Elements A table of elements based on their atomic number, electron configurations, and recurring chemical properties
reactivity The ability of valence electrons in an atom to form chemical bonds with other atoms
atomic number The number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
mass number The total numbers of protons and neutrons in a nucleus
atomic mass The mass of an atom of an element (mass number along with the weight of the electrons in the atom)
element Any material that cannot be broken down into more fundamental substances
Created by: pyang24



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