Chemistry Unit 3 Test Studyguide

Where are the metals on the periodic table?

everything to the left of the stairsteps but hydrogen

Where are nonmetals found?

To the right of the stairstep + hydrogen

What is an ion?

atoms or groups of atoms that have a positive or negative charge

What is a cation?

positive ion

What is an anion?

negative ion

What do nonmetal ion names end in?

-ide

What is a compound?

2 or more elements chemically combined

What are the 2 types of compounds?

ionic and molecular

What does a molecular compound have?

2 nonmetals

What does an ionic compound have?

one metal + one nonmetal

What are the charges for metals?

Group 1A: +1

Group 2A: +2

Group 3A: +3

When do you use roman numerals?

to indicate charge

What are the charges we always know?

Ag = +1

Cd = +2

Zn = +2

What are the ionic charges for nonmentals?

Group 7A: -1

Group 6A: -2

Group 5A: -3

Group 4A: -4/+4

noble gases: none

What are polyatomics?

tightly bound groups of atoms that behave as a unit and have a charge

What are the prefixes 1-10?

mono = 1

di = 2

tri = 3

tetra = 3

pentra = 5

hexa = 6

hepta = 7

octa = 8

nona = 9

deca = 10

What is a binary compound?

composed of 2 elements

What is an ionic compound?

metal + nonmetal

What is a ternary compound?

contains 3 or more different elements (contains a polyatomic)