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Chapter 2

QuestionAnswer
The proposition that early in Earth's history ,simple chemical compounds in the atmosphere and ocean combined to form larger more complex substances. Chemical Evolution
What number shows the amount of protons ? Atomic Number
Substances that create material ? Elements
what is a element with different numbers of neutrons ? Isotopes
What do you get when you add the number of protons and neutrons? Mass number
What is used to measure weight of an atomic structure? Atomic mass unit
The outside rings of an atom orbitals
The orbit of an electron around the cell nucleus. electron shells
What electron can participate in chemical bonds with other structre? valence electrons
measure of a number of bonds formed by an atom of a given element. valence
an attraction of two atoms that allows the formation of chemical substances. chemical bonds
First element on the periodic table. Hydrogen
Sixth element on the periodic table. carbon
sevnth element on the periodic table. nitrogen
Eighth element on the periodic table. oxygen
elevnth element on the periodic table. sodium
twelvth element on the periodic table. magnesium
fifteenth element on the periodic table. phosphorus
Sixteenth element on the periodic table. sulfur
seventeenth element on the perodic table. chlorine
form of chemical bonding covalent bond
am electrically nuetral group of two or more atoms held together by coavalent bonds. molecules
when two identical non-metals equally share electrons between them. nonpolar covalent bond
a chemical property that describes the tendency of an atom or a functional group to attract electrons towards itself. electronegativity
a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions. ionic bonds
nuetral atom. ions
negatively charged atom. anions
positively charged atom. cations
vitamin C = 2 x C3H4O3 = C6H8O6 molecular formula
H H | | H - C - C - O - H | | H H structural formula
a process that leads to the transformation of one set of chemical substances to another. chemical reaction
a unit of measurement used in chemistry to express amounts of a chemical substance. mole
The weight of a molecule is the sum of the weights of the atoms of which it is made. molecular weight
a homogeneous mixture composed of only one phase. solution
the number of moles of solute dissolved in one liter of solution. molarity
is a liquid, solid, or gas that dissolves another solid, liquid, or gaseous solute solvent
A molecule with a net dipole as a result of the opposing charges polar (molecule)
Term for a substance that wont mix with water hydrophobic
Created by: arieshughes