Ch.5: Molecules and compounds Flashcards Preview

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Flashcards in Ch.5: Molecules and compounds Deck (18)
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1

All samples of a given compound have the same proportions of their constituent elements.

law of constant composition

2

Indicates the elements present in the compound and the relative number of atoms of each element

Chemical formula

3

The _________ in a chemical formula represents the relative numbers of each type of atom in a chemical compound; they never change for a given compound

subscript

4

The simplest whole number ratio of atoms of each element in a compound. ALWAYS A WHOLE NUMBER.

empirical formula

5

the actual number of atoms in each element in a molecule of the compound.

molecular formula

6

uses lines to represent chemical bonds and shows how the atoms in a molecule are connected to each other

structural formula

7

have single atoms as their basic units

atomic elements

8

do not normally exist in nature with single atoms as their basic units. EXIST AS DIATOMIC MOLECULES

molecular elements

9

diatomic elements include

hydrogen
oxygen
nitrogen
flourine
iodine
bromine
chlorine

10

are composed of two or more nonmetals

molecular compounds

11

are composed of one or more cations paired with one or more anions. Nonmetal vs Metals

ionic compounds

12

Rules for writing formulas for ionic compounds

-contain both positive and negative charge
-Cancel out one another

13

Most polyatomic ions are _______, anions containing oxygen.

oxyanions

14

one with more oxygen atoms ends in

ate

15

one with fewer oxygen atoms ends in

ite

16

Naming molecular compounds form

prefix>name of 1st compound>prefix> base name>end in ide

17

PREFIXES

mono
di
tri
tetra
penta
hexi
hepta
octa
nona
deca

18

are molecular compounds producing H+ ions when dissolved in water.

Acids