vocab for matter and elements

Term Definition
Matter Anything that takes up space and has mass
Mass The material that matter is made up of
Volume How much room/volume matter takes up
Density Density=mass/volume the amount of material/stuff matter takes up within a specific space
Atom Smallest part of an elements, the building blocks of all matter
Electron Has an attractive force that allows it to bond with other atoms creating everything in the universe
Proton Particles of an atom with a positive charge located inside the nucleus
Neutron Particles of an atom with a neutral /no charge located inside the nucleus along with a proton
Periodic Table Large grid that identifies and classifies all of the elements by their chemical and physical properties
Elements The simplest substances that cannot be broken down / they make up all matter in the universe
Periods/Rows Rows that tell how many energy levels each elements has for the electrons to move around
Groups Or Family/Columns Columns that tell how many valence electrons each has/the number of electrons that can move on its outer shell/energy level
Valence Electrons The electrons that move on the outer shell/energy level of an atom
Atomic Number How many protons an element has inside the nucleus/usually is same # of neutrons and elctrons
Atomic Mass The measurement of the mass for an elements atoms
Chemical Property The ability of substance to combine with one another forming new and different compounds and molecules
Physical Property The state of matter and appearance of a substance
Ionic Bond When elements either lose or gain an electron during bonding
Covalent Bond When elements share electrons during bonding
Chemical Change/Reaction Elements bond together through the attractive force of electrons creating some type of reaction and change
Compound/Molecule Two or more elements combine together in a specific ratio/pattern creating a whole, new and different substance
Mixture Two or more substance combined together keeping their original properties, they do NOT change into a new substance/compound
Nobel Gases All of the elements in Group #18- they are the most stable elements because they have eight electrons in their outer shell
Halogens All of the elements in Group #17- they are very reaction bonding easily with elements in group #1 because they have seven valence electrons and want to be stable
Alkali Metal All of the elements in Group #1- they are very reactive because they have only one valence electron
Metalloids Elements between metals and non-metals that can react either way, they have 3-7 valence electrons
endothermic chemical reaction that it "takes in" energy.
ex: vinegar and baking soda
exothermic energy is released
ex: sunlight/fusion
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