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Chemical Bonding

Questions about the various chemical bonds elements make in compounds.

500 Questions

What is a name for a familiar ionic compound?

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Sodium chloride (NaCl) found in the home as TAble Salt.

Also

Sodium bi-carbonate (NaHCO3) as Baking #Poder.

Sodium Carbonate (Na2CO3) as washing sode/ soda crystals.

Sodium stearate ( NaOOC(CH2)16CH3) as soap.

Can two cations form ionic bond?

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NO!!!

Because they are both positive ions , they will REPEL each other.

An ionic compound has both positive and negative ions. ~Thet attract each other.

NB

Think of the North and South poles of a magnet. Two north poles facing each other REPEL . A borth and South pole facing each other ATTRACT.

What is the ionic compound name for Na2O?

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Na2O is Sodium Oxide.

How are atoms held together by a convalent bond?

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By sharing electrons.

The analogy is like two people linking arms.

What are three properites of an ionic compound?

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Both CATIONS (M^([n]+)) and ANIONS (X^([n]-)) are needed.

It has a high melting point.

It does NOT conduct electricity as a solid, but does conduct electricity, when liquid or in solution.

The bonding is ionic (NOT Covalent)

Forms a giant crystalline lattice.

Is diamond an ionic bond?

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NO!!!! It a covalent bond.

Any one Carbon atom makes four single covalent bonds to four adjacent carbon atoms. The structure is referred to as ADAMANTINE.

Diamond is an ALLOTROPE of Carbon. Othe carbon allotropes are graphite(soot) and Buckminster Fullerene(Footballene)

What is the rule when writing the name of an ionic compound that contains a transition metal?

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To indicate the oxidation number using Roman numerals.

e.g.

Ferric oxide or ferrous oxide /??? Which

Ferric oxide (Fe(II)O).

Ferrous oxide (Fe2(III)O3).

or

Potassium permasnganate KMnO4 The manganese is (+7) . hence

KMn(VII)O4

Is BaCl ionic or covalent?

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Ionic

What is the chemical formula for LiO?

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LiO DOES not exist.

Lithium oxide has the formula 'Li2O'.

What is the name of formula LiBr?

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LiBr

= Lithium bromide

==================an ionic compound

Which molecules were nonpolar because all bonds were nonpolar?

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H2, CH4, Cl2, C2H2, CO2, O2 were all non polar atoms because they all were not lone pairs (meaning that there were no one dots).

Also don't write this down but look at all the bonds. They all have 2 or 4 and not 3 or 5. For example: Cl2 and not Cl3.

Is CH2Br2 ionic or covalent?

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Ionic

What is the correct name for the compound Fe2O3?

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Fe2O3 is ' iron(III) oxide' . Archaically and commerically it goes by the name of 'ferric oxide' or iron ore.

Is C2H4 ionic?

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no it is covalent because it is between two nonmetals but a ionic is between a metal and nonmetal

Do the polyatomic ions meet the requirements to be called compounds?

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No, because part of the definition of a compound is a requirement for lack of net electric charge, but any ion by must have a net electric charge.

Will bromine and rubidium form and ionic compound?

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YES!!!

2Rb(s) + Br2(l) = 2RbBr(s)

It is similar to the sodium / chlorine reaction, and compound.

Can calcium and oxygen bond?

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YES!!! THey form calcium oxide, other wise known as 'lime' or 'quicklime'.

Which halogen is found in household bleach?

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Household bleach is Sodium Hypochlorite, NaOCl, in a diluted form, and may have minor additives from the manufacturer.

How many protons nuetrons and electrons are in 162Gd plus 3?

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Gd is Gadolinium Which has:-

#1 ; Atomic No.(Z) 64

#2 ; Proton Number is 64

#3 ; Electron number is 64 in the neutrally charged atom .

However, the '+3' indicates that it is the Cation 'Gd^(3+). This means that it has ionised three electrons, hence the number of electrons in Gd^(3+) is 61.

Its Atomic Mass is 162 . This number is the sum total of all the protons and neutrons in the nucleus of the atom.

Hence the number of neutrons is 162 - 64 = 98 neutrons.

However, this isotope of Gadolinium is not stable. The most common stable isotope of Gd is [158/64]Gd.

NB Your 162Gd + 3 is questioned???as an unknown isotope of Gd.

Is Lithium Oxide ionic or convalent?

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Definitely IONIC

Remember ALL Group(1) metals for IONIC compounds.

The Group (1) metals are

lithium, sodium, potassium, rubidium, caesiu, & francium.

Do oxygen and oxygen form an ionic bond?

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Two oxygen atoms form a double covalent bond 'O=O' (symbolically as O2).

However, osygen has an alloptrope

This is were three(3) oxygen atoms combine in a triangular manner. This is called 'ozone'. (symbolically O3).

Is Be(CrO4) ionic or covalent?

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Be3P2

Is an ionic compound made up of the group II metal beryllium, a cation is this compound and the nonmetal phosphorus, an anion is this compound.

Be 2+

and

P 3-

combine ionicly to form

Be3P2

How do you tell how many protons neutrons and electrons are in an atom?

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Inspect the Periodic Table.

For every element two numbers are given.

The larger number is thre ATOMIC MASS. and ther smaller number is the ATOMIC NUMBER.

The ATOMIC NUMBER tells, us ;-

#1 ; the elements position in the periodic table.

#2 ; the number of protons in the nucleus of the element

#3 ; the number of electrons in the neutrally charged atom.

If you subtract the Atomic mass from the Atomic Number , the difference is the number of neutrons in the nucleus.

Taking Carbon as an example.

Symbol 'C'

Position in the periopdic Table is '6'

Number of protonsw in the nucleus is '6'

Number of electrons in the neutrally charged atoms is '6'

The atomic Mass is given as '12'

So subtracting 12 - 6 = 6 Six is the number of neutrons in carbon.

NB For every element, the Atomic Mass may vary. This is because the number of neutrons may vary. Carbon is no exception.

This variations are knowen as isotopes.

Above are the details for the commonest isotope of carbon.

However, Carbon has isotopes

C-13 , 7 neutrons (used in nmr analysis)

C-14 , 8 neutrons. (carbon dating).

Is MgCl2 a polar covalent bond a covalent bond or an ionic bond?

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MgCl2 is an ionic compound. there is a large difference in electronegativity between Mg and Cl.

What kind of bond do hydrogen and clorine make?

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Though they dissociate into ions in an aqueou solution, a bond between hydrogen and chlorine is covalent.