Properties of Matter
Anything that has mass and takes up space.
What is Matter.
Element's abbreviation; first letter is capitalized and second letter (if it has one) is lowercase.
What is chemical symbol?
Symbols and subscripts used to represent a substance.
What is a chemical formula?
SO3
Sulfur = 1
Oxygen = 3
_H2 + _O2 -> _H2O
2H2 + _O2 -> 2H2O
Smallest complete part (building block) of matter.
What is an Atom?
Chemical property that describes the likelihood and rate at which a substance undergoes a chemical reaction.
What is Reactivity?
Number at lower right of element's symbol in a formula; shows number of atoms for each element.
What is a subscript?
C6H12O6
Carbon = 6
Hydrogen = 12
Oxygen = 6
_Al + _O2 -> _Al2O3
4Al + 3O2 -> 2Al2O3
Substance made of only one kind of atom.
What is an element?
Outermost electrons in the electron cloud which determine an element's chemical properties.
What are valence electrons?
A substance made of two or more atoms.
What is a molecule?
CH3COOH
Carbon = 2
Hydrogen = 4
Oxygen = 2
_SO3 + _H2O -> _H + _SO4
_SO3 + _H2O -> 2H + _SO4
Central part of an atom; contains most of its mass.
What is a nucleus?
Number of protons that an element has found on top of element squares.
What is atomic number?
A molecule made of two or more elements.
What is a compound?
Cu3(PO4)2
Copper = 3
Phosphorous = 2
Oxygen = 8
_AlBr3 + _Cl2 -> _AlCl3 + _ Br2
2AlBr3 + 3Cl2 -> 2AlCl3 + 3Br2
Part of an atom surrounding the nucleus; consists mostly of empty space in which electrons move.
What is an electron cloud?
Determines the identity of an element; this number also equals the number of electrons in a neautral atom.
What is atomic number?
Color change, temperature change, gas formation, or precipitate (solid) formation is often observed when this phenomenon is occurring.
What is evidence of a chemical reaction?
8Fe(H2O)4(OH)2
Iron = 8
Hydrogen = 80
Oxygen = 48
_Al2(SO4)3 + _Ca(OH)2 -> _Al(OH)3 + _CaSO4
_Al2(SO4)3 + 3Ca(OH)2 -> 2Al(OH)3 + 3CaSO4