Properties And Elements Flashcards
Noble gas
7 elements that make up group 18
Chemical property
Ability to change into a new substance
Physical property
Characteristics that can be considered bearded or measured without changing to substance
Elements in family
Elements that share chemical properties with rachother
Chemical reaction
Process of becoming a new substance
What substances will have during a reaction
New chemical and physical properties
Physical change
Change that affects one or more of the physical properties but the identity stays the same
Mixtures
When two or more different substances are physically combined (no chemical connection)
Substance
An elements or compound composed of specific parts
Element
A pure substance that can not be separated physically or chemically
Molecules and compounds
Made of elements In a specific ratio that stays the same
Compounds
Made of atoms of different elements bonded together. Can only be separated chemically.
Mixtures
Can be separated physically. Molecules of elements and compounds that are not chemically bonded.( held together physically)
Alcohol is considered as a
Compound
Air is
A mixture
H2O is
Compound
What number tells us that there is more than one atom and is combined with another atom
Subscript
Rust, tarnish and decompose all react with
Oxygen
Electrons that make a full outer shell
2( for hydrogen and helium) 8 for other elements
Determines wether or not an atom will react with another atom
Valence electrons
