yes

H2S is hydrogen sulphide.

Hydrogen sulphide has the smell of 'rotten eggs'., which is the gas given off by rotten eggs.

Decane has 10 carbons, C10H22.

The nomenclature uses Latin root names.

Meth = 1

Eth =2

Prop = 3

But = 4

Pent = 5

Hex = 6

Hept = 7

Oct = 8

Non= 9

Dec = 10

YES!!! All matter contains protons, neutrons and electrons.

These particles are sub-atomic particles, and make up an atom .

Atoms then make up all matter.

What is C2h2cl2??? If you mean C2H2Cl2 Note the use of capital letters.

Then it is an alkene.

It could be

1,1- dichloroethene.

Cl2C=CH2

or

1,2- dichloroethene

ClHC = CHCl

This could then be either cis(Z)/trans(E) isomers.

NO!!!

Carbon atoms are not a compound

Oxygen atoms are not a compound.

However, they do combine to form the compound carbon dioxide (CO2)

The halogens making up group 17 on the periodic table have seven electrons in their outer shell. The five highly reactive elements in this group are Fluorine, Chlorine, Bromine, Iodine, and Astatine.

Well, they're probably not really particles ... but they're called "photons".

Atoms which can be further classified as protons, electrons and neutrons.

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).

Nine(9).

Remember ; **Non**ane has 9 carbons.

The cyclo bit tells us that they are arranged in a 'circle/loop' ; not a line.

This is a chemical element. You can find the how many electron in a single atom by using a Periodic Table.

Atoms have three subatomic particles; viz., protons, neutrons and electrons.

The protons, and neutrons are in the nucleus of the atom and are collectively named as 'nucleons'. Electrons are in energy shells outside and around the nucleus.

Atoms with a different number of protns and different elements.

An ion can be formed by either losing or ganing electron(s).

E.g.

Sodium metal can become the sodium ion by losing one electron .

Na)g) = Na^+(g) + e^-

Oxygen gas can become the oxide ion by gaining two electrons.

O2(g) + 4e^- = 2O^2-(g).

NB

Uncharged entities are ATOMS .

Charged Entities are IONS.

The word 'ion', is a collective noun for ; - CATIONS ( positively Charged ions), and ANIONS (negatively Charged ions).

4

All the gases except the Noble(Inert) gases, which are monatomic.

You have half answered this question for yoiurself ( produced) ; the answer is 'PRODUCTS'.

They becomes negatively charged anions.

eg.

Cl2(g) + 2e- = 2Cl^(-)

The object is named an 'ANION'.

A CATION has positive charge.

Collectively they are named as 'IONS'.

2.3456 grams lead (1 mole Pb/207.2 grams)

= 0.01132 moles of lead

=================

The number in the subscript of a chemical formula tells the number of that atom in a molecule. For example, in H2O, the 2 tells you there are 2 hydrogen atoms in the water molecule. in C3H8, there are 3 carbon atoms and 8 hydrogen atoms as reflected by the 3 and 8 in the formula respectively.

Protons and electrons.

However, the number of neutrons may vary to give isotopes.

It is the alcohol , methanol . Its chemical symbol is usually qritten as 'H3COH 'or

HCH2OH . The -CH2OH form indiocates that it is an alcohol.

The definitive statement is 'Isotopes of an element have a different number of neutrons'.

Taking hydrogen as an example.

It has three isotopes;-

#1 ; protium ; 1 proton, 0 neutrons, 1 electron ( The commonest isotope)

#2 ; deuterium ; 1 proton, 1 neutron, 1 electron ( also known as heavy hydrogen)

#3 ; tritium ; 1 proton , 2 neutrons, 1 electron ( radio-active; and also known as super heavy hydrogen).

Note in each case the different number of neutrons.

Protons are always in the nucleus of an atom.

The number of protons indicates the element, its position in the periodic table.

Protons a deemed to have a charge of (+)

Protons are deemed to have a relative mass of '1' .

The total number of protons and neutrons in the nucleus of an atom is the Atomic Mass. Collectively they are named as 'Nucleons'.