Vocabulary for Matter and Elements

Term Definition
matter everything that takes up space and has mass
mass the material that matter is made up of
volume how much room/space matter takes up
density D=m/v relates the mass of a material in a given volume
atom the basic particle from which all elements are made
electron a particle in a atom that has a negative charge
proton particle of an atoms that positive charge located in the nucleus
neutron particle in a atom that has a neutral or no charged center
Periodic Table grid that identifies and classifies the elements into periods and groups by their chemical and physical properties
periods/rows tell how many energy levels each elements have
groups/colums tell how many valence electrons each element has the number of electrons that move on its outer shell
valence electrons electrons that move on the outer shell energy levels
atomic number how many protons an element has inside the nucleus usually the same number of electrons and neutrons
atomic mass the measurement of mass for an elements atoms
chemical properties ability of a substance to combine with one another forming
physical property states of matter and appearance of a substance
ionic bond when elements either lose or gain an electron during bonding
covalent bond elements share electrons during bonding
chemical reaction elements bond together through the attractive force of electrons creating some type of reaction and change
compound/molecule 2 or more elements combined n a specific ratio or pattern
mixture 2 or more substances combine together keeping their original properties no new substance
Nobel Gases elements in GROUP#18 most stable elements
Halogens elements in GROUP#17 very reactive bonding easily
Alkali Metals elements GROUP#1 very reactive
Metalloids elements between metals and non-metals

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