writing the chemical formula of a given compound

8/7/2019 WRITING THE CHEMICAL FORMULA OF A GIVEN COMPOUND

1/14

WRITING THECHEMICAL FORMULA

OF A GIVEN COMPOUND


2/14

INTRODUCTIO

N


3/14

By combiningelements, compoundsare formed. Acompound is a puresubstance of definitecomposition that canbe joined to formanother substance. Acompound is different froman element although they arerelated with each other. An

element is another pure substance thatcannot be decomposed into simplersubstances. But what is the relationshipbetween the two?


4/14

Well, you cannot form a compoundwithout an element because it makes up acompound. And it is important for you tobe familiar with the elements because itwill enable you to understand the maintopic easily.

Elements are divided into threeclasses: metals, non metals and metalloids.Metals are elements that tend to losetheir valence electrons. Valence electron

is the electron in the outershell of an atom. A nonmetal is an element thattends to gain electrons to

complete its outer electron shell while a


5/14

metalloids are elements that maypossess the properties of a metal and anon metal.

On the other hand, while there is areaction taking place between two

elements, there is losing and gaining ofone or more electrons from an atom or amolecule and this charged particle isknown as ion. Ion is classified into

monoatomic or polyatomic. Knowing aboution is also an important factor in writingthe chemical formula of a compound.


6/14

Now that you havelearned about elements,compounds and ion,

you will now be ableto write the chemicalformula of a compoundwith ease.


7/14

OBJECTIVES


8/14

To give the rules in writing thechemical formula of a givencompound.

To define the unfamiliar termsrelated to the topic.

To illustrate/show the steps in

writing the chemical formula ofcompounds.


9/14

DEFINITION OF

TERMS


10/14

ELEMENT- a pure substance that can be

decomposed into simpler substanceCOMPOUND- a pure substance of

definite composition that can be joined toform another substance

BINARY COMPOUND- a compoundcontaining two elements per molecule

TERNARY COMPOUND- a compound

containing three or more elements permolecule


11/14

CHEMICAL FORMULA- a way of

expressing information aboutthe atoms that constitute aparticular chemical compound

ION- charged particle resulting from the

loss or gain of one or more electrons froman atom or molecule

MONOATOMIC ION- ions which areformed from a single atom

POLYATOMIC ION- ions containing morethan one atom


12/14

PURE SUBSTANCE- A sample of matter,

either an element or a compound, thatconsists of only one component withdefinite physical and chemical propertiesand a definite composition

METALS- are elements that tend to losetheir valence electrons

NONMETALS-elements that tend to gainelectrons to complete its outer electron

shellMETALLOID- can be either metal or non

metal


13/14

OXIDATIONNO. - a small number

related to the degree of positive ornegative character of an atom in amolecule or polyatomic ion, or to thecharge in a monoatomic ion

VALENCE ELECTRON- electron in valenceshell of an atom; determines how anelement reacts

ELECTRON- a subatomic particle carrying

a negative electric charge


14/14

DISCUSSION

writing the chemical formula of a given compound

Documents