YES!!! All nitrates are soluble.

0.1 molar solution around 8.9 at 25C Per Merck Index...

You misunderstand!!!! a compound is broken down into its elemental atoms.

There are millions of covalently combined compounds.

However, the two simplest are water and carbon dioxide.

Often represented by Water (H2O) ; H-O-H , and Carbon Dioxide (CO2) ; O=C=O

The lines between each atoms indicate the number of COVALENT bonds formed between atoms.

You misunderstand, and have your thinking the wrong way about.

It is ' All molecules consist of elements.

The water molecule consists of the two elemental atoms oxygen and hydrogen. However, the water molecule has the formula 'H2O'. It consists of ONE elemental atom of oxxygen and TWO elemental atoms of hydrogen .

Carbon dioxide molecules consist of two elemental atoms oxygen and carbon.

However, the carbon dioxide molecule has the formula 'CO2'. It consists of ONE elemental atom of carbon and TWO elemental atoms of oxygen .

An ATOM is the smallest indivisible particle

An ELEMENT is a group of atoms of the same type ( tyhat can be 'held'.

A MOLECULE is a group of atoms, of the same or different elements, that have combined together. e.g. Oxygen (O2) , water (H2O) etc.,

A CATION is a positively charged ion . e.g. Na^(+)

The sodium metal has IONISED by losing one electron to form the CATION. (Na^(+)).

Similarly calcium metal ionises by losing two electrons to form the CATION Ca^(2+).

NB An ANION is a NEGATIVELY charged ion e.g. Cl^(-)

Cations and Anions are collectively known as 'Ions'.

So your statement 'Cation ion' is incorrect. You just need the word 'cation'.

In a flame test the copper ions in copper chloride will produce a 'blue/green' flame.

To test for metal ions, the flame colour in a flame test is indicative of the metal present.

Lithium = Red

Sodium = Yellow

Potassium = Lilac (pale purple).

There are many more flame test colours.

Chlorine, Fluorine, Bromine, Iodine and Astatine are members of the Halogen family.

Yes, iodine (I₂) can react with potassium fluoride (KF). The reaction between iodine and potassium fluoride typically involves the displacement of fluorine in potassium fluoride by iodine. The balanced chemical equation for this reaction is:

[I_2 + 2KF \rightarrow 2KI + F_2]

In this reaction, iodine displaces fluorine in potassium fluoride, forming potassium iodide (KI) and elemental fluorine (F₂). It's worth noting that the reaction conditions, such as temperature and solvent, can influence the reaction kinetics and outcomes.

yes

'Hydrogen Carbonate???? Do you mean Carbonic Acid . (H2CO3) or a Bi-carbonate such as sodium bi-carbonate. )NaHCO3)

Green plant life.

Carbon dioxide in absorbed by green plant leaf. It undergoes photosynthesis in the plant; the oxygen is released back into the atmosphere and the carbon is retained in the plant as biomass.

It is part of the Carbon / Oxygen cycle.

Definitely NOE-FERROUS.

The word 'ferrous/ferric' is the Latin based adjective for IRON. (Ferrum).

Since there is no iron present in cerium oxide then it is non-ferrous.

Its RED .

Thered comes from the fact the blood molecule has an iron (III) [Fe^(3+] ion at its centre.

The ion 'Iron (III) is RED in colour.

In the lab. look at the colour of iron(III) chloride and iron(II) chloride.

Iron (III) chloride is red/brown in colour and iron(II) chloride is green in colour.

YES!!!

You inhale oxygen and exhale carbon dioxide.

Who is Sir Humphrey David???? I think you mean Sir Humphrey DAVY. Note the spelling of the surname.

Na3P1O4 is usually written as Na3PO4

Note the '1' is missing / not written.

NNB For all chemical formulae if there is only ONE atom present in the formula, then the '1' is NOT written.

e.g. H2O ; only ONE oxygen

e.g. CO2 ; only ONE carbon.

The chemical symbol for the element, chromiun is 'Cr'.

Sodium chloride is an inorganic crystalline ionic compound.

It is formed by the ions Na^(+) & Cl^(-).

When SOLID these ions are held tightly in a crystalline lattice. So does NOT conduct electricity .

However, when liquid or in aqueous solution the crystalline lattice breaks down and the ions are free to move. So when a potential difference (electricity) is put across these ions , they will move. The positive ions will move towards the negative point and conversely the negative ions will move to wards the positive point. Hence an electrical circuit is made.

It is quite easy to dissolve sodium chloride in water to make an aqueous solution.. Electricity is conducted.

#However, the melting point of sodium chloride is very high , so in a school lab. you will not be able to reach a high enough temperature to make the crystals melt. (solid to liquid).

So for simplicity, just dissolve some sodium chloride (salt) in water and it will conduct electricity.

Hydrogen (H2)

This reaction follows the general formula for acid/metal reactuo0ns.

Acis + Metal =- Salt + hydrogen .

Here is the Balance reaction eq'n

2HCl(aq) + Mg(s) = MgCl2(aq) + H2(g)

H2SO4(aq) + Mg(s) = MgSO4(aq) + H2(g)

2HNO3(aq) + Mg(s) = Mg(NO3)2(aq) + H2(g)

NO!!!

'H' is Hydrogen

There is no element with the symbol 'L'.

YES!!!!

The prime numbers from 0 to 20 are

2,3,5,7,11,13,17, & 19,

A molecule of hydrogen, also known as molecular hydrogen, is composed of two atoms of hydrogen. This diatomic molecule is represented by the chemical formula H₂, indicating the two hydrogen atoms are bonded together.

NO!!!

PbO is lead oxide , and the lead is in oxidation state '2'.