Alkali metals, not H. Soft, shiny metals able to be shaped. React violently with water. Have a 1+ charge when they become an ion.
Alkaline earth metals. Soft, shiny metals that react moderately with water. These have a 2+ charge when they become an ion.
All B Groups
Transition elements/metals- Cations
Halogens. Very reactive nonmetals. Most are colored gases at room temp. When they become an ion they have a 1- charge.
Noble gases. These are inert.
Relative mass of an average atom of an element on the 12/6 C scale. Number under the elemental symbol on the periodic table. Not the same as mass number (A). Due to isotopes. Can be calculated from 1. The number of isotopes of the element. 2. Relative mass of each isotope 3. Percent abundance of each isotope
Molar mass can specify quantity of material by
1. Mass 2. Amount
6.022 times 10 the 23rd power
Formed when oppositely charged ions are attracte dto one another. Caused by a transfer of electrons.
Nonmetals, sharing of electrons forming a bond.
Notation of elemental symbols and numerical subscripts that tells the elements and number of atoms of each element present. NaCl
Actual number of atoms of each element in a compound
Smallest whole number ratio of atoms present in a compound
Exist in nature as single atoms as their base units
Exist as molecules, 2 or more atoms of the same element bonded together
Composed of two or more non-metals covalently bonded.
3 types of molecular compounds
1. Diatomic 2. Triatomic 3. Polyatomic
Composed of cations and anions bound together by ionic bonds with a basic formula unit