Unit 2: Chemistry (Name to Formula)

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Unit 2: Chemistry (Formula to Name)

prefix shows the number of atoms in the formula. mono = 1, di = 2, tri = 3.

Keeps the name and has a 2 next to it represnting that it has the 2 of the same atoms. ex. H2 = hydrogen

base: starts with the metal and ends with hydroxide. ex. Na(OH) => sodium hydroxide.

binary acid: hydro should be the prefix. then element name, which ends with -ic acid. ex. HBr => hydrobromic acid

oxy acid: polyatomic ending "ate" is removed and replaced with -ic acid. ex. H2CO3 => carbonic acid

is it a polyatomic derivatives?

Ex. Nitrate 2 less oxygen: hyponitrite (NO)1- 1 less oxygen: nitrite (NO2)1- Normal: chlorate (ClO3)1- 1 more oxygen: perchlorate (NO4)1-

Is it a polyatomic ionic compound?

yes?

Cation (+) followed by anion, only changing to "ide" if single atom anion. ex. Au2O3 => gold (III) oxide

is it binary compound?

Yes?

metal's name comes first. nonmetal comes in second. non-metal ending is changed to "ide"

is it a multivalent?

yes? Then the name of the metal goes first. Afterwards, add Roman numerals in brackets. the non-metal ends with -ide. ex. tin (II) oxide

Unit 2: Chemistry (Name to Formula)

is it a molecular compound?

does any of the elements have: mono, di, tri, tetra, penta, hexa, hept, octa, nona, deca? ex. phosphorus pentasulphide => PS5

is it a diatomic?

is it written as: (naturally have 2 of the same atoms) hydrogen - h2, nitrogen - N2, chlorine - Cl2, iodine - I2, oxygen - O2, fluorine - F2, bromine - Br2

is it an acid or base?

no?

base: does it have hydroxide? ex. sodium hydroxide

does it have -ic acid at the end?

binary acid: does it contain hydro as a prefix? ex. hydrochloric acid ==> HCl

oxy acid: does it contain hydrogen, oxygen and one other element? ex. sulfuric acid ==> H2(SO4)

is it an polyatomic ionic compound?

does it contain more than 2 elements but still have a cation and anion?

does it have any of these? nitrate, carbonate, chlorate, sulfate, phosphate, ammonium, hydroxide, acetate, bicarbonate/hydrogen carbonate, chromate, or permanganate? ex. sulfate => (SO4)2-

is it a polyatomic ion derivatives?

does it also end with any of these: hypo-ite, -ite or per-ate? ex. hyponitrite => (NO)1-

Is it a multivalent Binary Ionic?

Does it have a metal with more then one ionic charge combined with a non-metal? ex. lead (IV) chloride => PbCl4

Is it a binary compound?

no?

==>

yes?

Does it have metal as 1st and non-metal as 2nd? ex. lithium (metal) and oxygen (non-metal) ==> Li2O