Yes!!! The two most well known covalent compounds are water(H2O) and carbon dioxider (CO2). Yhere are many more covalent compounds.

Conversely the most well known ionic compound is sodium chloride ( common table salt).

Many substances have a mixture of covalent and ionic bonding. e.g. calcium carbonate. The calcium is ionically conded to the carbonate, but the bonds within the carbonate are covalent.

'HC2H3O2' is a rather poor way of writing the formula for ethanoic(acetic) acid.

It is usually written as 'CH3COOH'.

What is Cs2o . If you mean Cs2O, then the name is Caersium oxide.

NB For all chemical symbols.

#1 A one letter symbol is ALWAYS a CAPITAL letter, hence oxygen is 'O' . not 'o'.

#2 A two letter symbol is first letter a capital letter and the secons letter is always small/lower case. , caesium is 'Cs' as given.

Ammonium chloride.

Here are a few names of Ionic Compounds;_

Sodium Chloride (NaCl)

Lithium fluoride (LiF)

Potassium bromide (KBr)

Rubidium Iodide ( RbI)

Calcium Oxide (CaO)

Magnesium sulphide (MgS)

This list in NOT exhaustive. There plenty more ionic compounds.

The bond between carbon (C) and nitrogen (N) in hydrogen cyanide (HCN) is a triple bond. This means that there are three pairs of electrons being shared between the C and N atoms, resulting in a strong and stable bond.

Carbon dioxide is a covalent molecule.

I think you mean CaCl2 which is calcium chloride

No bond is formed . Reason: Argon is a NOBLE(Inert) gas.

No
false

Three covalent bonds.

Cations have a positive charge e.g. M^+

Anions have a negative charge e.g. X^-

Becausethey have opposite charges they are attracted to each other, by electrostatic force.

Ther analogy is two different magnets. The north pole of one magnet is attracted to the south pole of the other magnet.

However, the two north poles will repel as will the two south poles.

So a Cation M^+ will combine with an anion X^-

M^+ + X^- = MX .

Hover the charges MUST also baloance.

So a cation of M^(2+) will need two anions of X^-

M^(2+) + 2X^- = MX2

2M^+ + X^(2-) = M2X

This is a phase change from solid to liquid which occurs at a fixed temperature when the ionic lattice breaks down. In general ionic compounds are high melting.

Covalent bonding.

Polypropylene is a polymer its structure is shown as

-[-CH(CH3)-CH2-]- n

It monmer is propene ( CH2=CH-CH3 )

One bond of the double bond breaks open and combines with another 'broken' propene double bond to becomes a larger chain . THe whole is covalently bonded throughout.

NO!!!

It is an Ionic bond, similar to sodium chloride.

What is 'li2s' .?

If you mean 'Li2S'. Then it is an ionic molecule.

Lithium atom form the lithium ion.

Li(s) = Li^(+) + e^-

Sulphur has electron affinity and forms the sulphide ion.

S(s) + 2e^(-) = S^(2-)

Since these two ions have opposite charge (+/-), they are attracted to each other like the North and South poles of a magnet.

Also the charges must balance . So you need 2 lithium ions (2Li^(+)) to give an overall positive charge of '2+'. to balance with the '2-' of the sulphide ion.

The two lithium ions are electrostatically attracted to the sulphide ion to form the molecule lithium sulphide.

Overall it is described as an ionic molecule.

The balanced equation is

2Li(+) + S^(2-) = Li2S.

NB . When writing chemical formula, a one letter symbol is ALWAYS a CAPITAL letter. A two letter symbol is ; first letter is a CAPITAL letter and the second letter is always small/lower. case.

So sulphur is 'S' not 's' and lithium is 'Li' not 'li'.

Hope that helps!!!!

I think you have written the formula incorrectly. !!!

I think it should be

Be3(PO4)2

In which case it is beryllium phosphate.

As written 'Be3PO42' would indicate that there are '42' oxygens in the molecule. and only one phosphorus.

Brackets are used to indicate the phosphate anion. The '2' is used to inidicate that there are two phosphate anions.

Covalent bond.

Ethyl alcohol is the archaic name for ethanol (CH3CH2OH)

This is the alcohol that is drunk by humans in alcoholic drinks.

Ionic bond between Rb+ cation and Cl- anion.

boron

A single bond has - by definition, only one covalent bond.

How does a subscript affect the element just before it?

P2Br7

'Covalent'.

Di-nitrogen tetrachloride,. Cl2N-NCl2