Chemistry - Chapte 7

electron dot structure

a depiction of valence electrons around the symbol of an element

ionic compound

compound of cations and anions

valence electron

an electron in the highest occupied energy level of an atom

ionic bond

a depiction of valence electrons around the symbol of an element

chemical formula

shows the kinds and numbers of atoms in the smallest representative unit of substance

halide ion

an anion of a halogen

alloy

a mixture of two or more elements, at least one of which is a metal (stainless steel, chrome, cast iron)

octet rule

atoms in most compounds tend to achieve the electron configuration of a noble gas

formula unit

lowest whole-number ratio of ions in an ionic compound

coordination number

the number of ions of opposite charge surrounding each ion in a crystal

metallic bond

the attraction of valence electrons for positive metal ions

number off valence electrons of an atom in group 6A

6

when aluminum atom loses its valence electrons, what is the charge on the resulting ion

3+

why are metals good conductors of electricity

contain mobile valence electrons

ionic compound

electrically neutral, held together by ionic bonds, composed of anions and cations, solid at room temp, low melting point, conducts an electric current when melted

which element when combined with chlorine would most likely form an ionic compound

lithium

cation

any atom or group of atoms with a positive charge

when is the cation Fe3⁺ formed

an atom of iron loses three electrons