How can you tell if the compound is molecular?

Answer 1

An ionic compound is a pure substance that is formed from a metal and a nonmetal. It has a fairly high melting point and is a conductor of electricity when in a molten or aqueous state . A molecular compound, on the other hand, is a pure substance that is formed from nonmetals. It has a fairly low melting point, and cannot conduct electricity regardless of state. Another important difference between the two is that an ionic compound is a crystalline solid at standard ambient temperature and pressure (SATP), whereas a molecular compound can be in a solid, gas or liquid state at SATP.

Answer 2

by looking at the element for example if the element has a number in front of it.

Na2

(Sodium) --> diSodium

Mg2O3 --> Magnesium triOxide

Prefixes = 1-mono 2-di 3-tri 4-tetra 5-penta 6-hexa 7-hepta 8-octa 9-nona

10-deca

So remember, it's the number in front of the 2nd element.

Answer 3

COMPOUND HAS TWO THINGS, WHICH ARE MOLECULE AND ION.Molecular compound when two or more atom A (non-metal) combine with two or more atom B (also non-metal).Ionic compound when two or more atom A (metal or you call it positively-charged) combine with two or more atom B (non-metal or you call it negatively-charged).

Answer 4

Ionic

-Has a high melting point

-Dissolves(dissociates into ions) in water.

-Brittle.(when you hit it with something,it cracks and breaks,can not be turned into another shape without breaking.

-Conducts electricity in aqeous solutions.

-Has a crystall,lattice structure.

-Usually formed by combining of a metal and nonmetal.

Covelant

-Low melting and boiling point.

-Usually formed between 2 non-metals.

-Does not separate into non metals in water.

-Easy to separate to elements than ionic ones.

That is mainly it.Nice and simple.

Answer 5

When you look at their formulas, you can easily distinguish between ionic and covalent (molecular) compounds.

There is a limited number of elements which are nonmetals.

You can easily memorize them:

H , O , N , C , S , P , F , Cl , Br , I

The others can be considered as metals.

If the formula of a compound contains only the symbols of nonmetals, that compound is molecular (covalent) compound.

For example; CH2O , PH3, H2O, CH3COOH, CON2H4.

Your compounds are also covalent.

HCl : both H and Cl are nonmetals.

H2S : both H and S are nonmetals.

If in any formula , you see only 1 symbol of a metal you can exactly say that it is an ionic compound.

For axample:

Li2Cr2O7 : both Li and Cr are metals.

CuSO4 : only Cu is metal.

NaNO2 : only Na is metal.

Therefore these are all ionic compounds.

But you must be careful. There is a polyatomic ion that creates a problem. It is "ammonium ion" = NH4^+

Since ammonium is a poly atomic ion it forms ionic salts. Therefore all ammonium salts are ionic.

Example; NH4NO3, NH4Cl, (NH4)2SO4, (NH4)3PO4

The formulas of the given compounds do not contain the symbol of a metal, but they are ionic compounds.

The formations of ionic and covalent compounds are different. Ionic compounds are formed by TRANSFERING electron(s) from a metal atom to a nonmetal atom.

Covalent compounds are formed by SHARING of electrons by two nonmetals atoms.

Therefore, by looking at their formulas we can also say that;

HCl ; a covalent compound formed by sharing electrons by H and Cl atoms.

H2S ; a covalent compound formed by sharing electrons by two H and S atoms.

NaCl : an ionic compound formed by transfering electron from Na atom to Cl atom.

K2S : an ionic compound formed by transfering electron from two K atoms to S atom.

Determining the number of electrons transfered or shared is a different subject and requires the knowledge of electron configurations and valence electrons.

Answer 6

Ionic compounds generally are composed of metals and non- metals. Molecular compounds are generally between non metals. This is a good starting point.

However this is not always the case:-

Some metal compounds are molecular, for example nickel carbonyl, Ni(CO)4,

Some are ionic in the solid but molecular in the vapour, for example FeCl3

Answer 7

If the formula contains a metal and a non metal it is ionic. If the formula contains a non metal and another non metal it is covalent

Answer 8

A molecular compound has more than one kind of element, an ionic compound consists of all the same element.

Answer 9

it will dissociate into ions when dissolved in a solvent