Vocabulary 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/space an object takes up.
Density Density = Mass/Volume The amount of material matter takes up within a specific space.
Atom Smallest particle of an element, everything is made up of them.
Electron Particle of an atom with a negative charge that moves in the nucleus and has an attractive force to bond with other atoms.
Proton Particle of an atom with a positive charge and is located inside the nucleus.
Neutron Particle of an atom with a neutral charge and is located inside the nucleus.
Periodic Table A large table that identifies and classifies all elements by their chemical and physical properties.
Element A pure substance that cannot be broken down and makes up all matter in the universe.
Periods/Rows Rows that tell you how many shells each element has for the electrons to move around.
Groups or Families/Columns Columns that tell the number of valence electrons an element has.
Valence Electrons The electrons that move on the outer shell of an atoms.
Atomic Number How many protons an element has inside the nucleus (usually is the same number of neutrons and electrons)
Atomic Mass The measurement of the mass for an elements atoms.
Chemical Property The ability of substances to combine with one another to form a new substance.
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 or 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 substances combine 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 reactive and bond easily with elements in Group #1 because they have seven valence electrons and want to be stable
Alkali Metals 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 A chemical reaction that takes in energy to make the temperature decrease.
Exothermic A chemical reaction that releases energy to make the temperature increase.

Hi there, would you like to get such a paper? How about receiving a customized one? Check it out