How to Write Compound Formulas: Ionic, Covalent, Polyatomic

How to write compound formulae H ow to write compound formulae M ultivalent H ow to write compound formulae Binary Ionic Polyatomic Covalent Multivalent B inary Ionic P olyatomic C ovalent S elect a type of compound! B inary Ionic B inary Ionic M ultivalent M ultivalent P olyatomic P olyatomic C ovalent C ovalent H ome H ome BACK BACK BACK N icholas T ang

How to write compound formulae H ow to write compound formulae M ultivalent H ow to write compound formulae Binary Ionic Polyatomic Covalent Multivalent B inary Ionic P olyatomic C ovalent A binary ionic compound is made of 2 elements, a metal and a non-metal, where both elements have only one ion charge (+ 1 , + 2 , + 3 ) S ome examples are: S odium (N a), P otassium (K ) and A luminium (A l). In all compounds, the positive ion (usually a metal) is named first and the negative ion (non-metal) is named second. E xample: M agnesium N itride M g2 + N3 - M g2 + N3 - M g2 + Y ou need 3 M agnesium and 2 N itrogen to balance even out M g3N2 M g3N2 B inary Ionic C ompounds B inary Ionic C ompounds BACK BACK BACK N icholas T ang

How to write compound formulae H ow to write compound formulae M ultivalent H ow to write compound formulae Binary Ionic Polyatomic Covalent Multivalent B inary Ionic P olyatomic C ovalent M ultivalent compounds are made of a metal and a non-metal. It is called multivalent because it the metal has more than 1 electrical charge (+ 1 , + 2 ). In order to identify the ion charge, there will be a roman numeral next to the name: gold (III) oxide, copper (I) fluoride E xample: platinum (II) nitride P t2 + N3 - P t2 + N3 - P t2 + N3 - x 2 = 6 It evens out on both sides 1 I 2 II 3 III 4 IV 5 V 6 V I 7 V II 8 V III 9 IX 1 0 - X It could also be P t3N4 if the name was platinum (IV ) nitride P t3N2 P t3N2 P t2 + x 3 = 6 M ultivalent C ompounds M ultivalent C ompounds BACK BACK BACK N icholas T ang

How to write compound formulae H ow to write compound formulae M ultivalent H ow to write compound formulae Binary Ionic Polyatomic Covalent Multivalent B inary Ionic P olyatomic C ovalent P olyatomic compounds are compounds that contain a polyatomic ion. P olyatomic ions are created when a number of atoms come together to form a group, and then that group can have either a positive or a negative charge. S ome examples are: N itrate (N O3-), A mmonium (N H4+) and H ydroxide (O H-). E xample: C alcium N itrate C a2 + N O3- N O3- C a(N O3)2 C a(N O3)2 P olyatomic C ompounds P olyatomic C ompounds BACK BACK BACK N icholas T ang

How to write compound formulae H ow to write compound formulae M ultivalent H ow to write compound formulae Binary Ionic Polyatomic Covalent Multivalent B inary Ionic P olyatomic C ovalent C ovalent compounds are compounds made of two or more non-metals. T hey are made when two or more non-metals share electrons and the bond that is created by sharing electrons is called a covalent bond. S ome examples are: O xygen (O ), F luorine (F ) and N itrogen (N ). E xample: C arbon D ioxide C+ 1 O2 - O2 - C ovalent C ompounds 1 mono 2 - di 3 tri 4 tetra 5 hexa 7 hepta 8 octa 9 nono 1 0 - deca C arbon D ioxide C O2 C O2 If you have ao or oo, turn it into o: heptoxide C ovalent C ompounds BACK BACK BACK N icholas T ang