Elements and Compounds

The electron configuration 4s²3d¹⁰4p³ corresponds to the element Arsenic (As), which is located in Group 15 of the periodic table. This configuration indicates that the element has a total of 33 electrons. In its elemental form, arsenic is a metalloid and is known for its various allotropes and applications in semiconductors and pesticides.

Formula: Au2O3

The stable compound formed between sodium and chlorine is sodium chloride, with the chemical formula NaCl. In this compound, sodium donates one electron to chlorine, forming an ionic bond between the two elements.

The element is CARBON.

Graphite , Diamond and Buckminster Fullerene(Footballene) are the three allotropic forms of carbon.

An ALLOTROPE of an element is when the element exhibits different physical characteristics, like appearance etc.,

NB Do Not confuse with ISOTOPE.

H2S is hydrogen sulphide. NOT the suffix ' ---ide'.

It has the 'rotten eggs' smell. When opening a rotten egg, it is this gas that you smell.

Glucose and oxygen are produced in the chloroplasts of plant cells during the process of photosynthesis. This process occurs primarily in the leaves, where chlorophyll captures sunlight to convert carbon dioxide and water into glucose and oxygen. The glucose serves as an energy source for the plant, while oxygen is released as a byproduct into the atmosphere.

No, compounds that contain only hydrogen, carbon, and oxygen do not all have the same properties. These compounds, which include various hydrocarbons, alcohols, and carbohydrates, can differ significantly in structure, molecular weight, and functional groups, leading to diverse physical and chemical properties. For example, glucose and ethanol, both containing C, H, and O, have vastly different behaviors and uses due to their distinct molecular structures.

Oxygen gains 2 electrons to become an oxide ion (O2-).

PbI2 has TWO(2) elements.

They are ;-

Pb ; Lead (Plumbum ; Latin)

I ; Iodine .

However, there are three (3) atoms in PbI2. Viz: -

1 x Pb(Lead)

2 x I (iodine)

1 + 2 = 3

The name of the sibstance is 'lead iodide'.

Neon is a colourless , odourless gas.

It glows only when an electrical discharge is passed through it; Neon lights.

Neither H2O nor MgSO4 are elements. They are COMPOUNDS.

In terms of volume occupied , MgSO4 is the larger.

No such compound!!!!

If you mean ' MgSO4. H2O ' , then it is monohydrated magnesium sulphate.

NB : When writing chemical elemental symbols , single letter symbols are ALWAYS a CAPITAL letter. Two letter symbols are written , first letter is a CAPITAL letter, and the second letter is small/lower case latter.

This is the international IUPAC recognised standard, and as shown in the Periodic Table. It is done in order to prevent confusion ; e.g. CO and Co , Carbon Monoxide and Cobalt respectively.

Hence Single letter symbols ;-

Sulphur is 'S' not 's'

Oxygen is 'O' , not 'o'

Hydrogen is 'H' , not 'h'

Two letter symbols

Magnesium is 'Mg' not 'mg'.

The polyatomic ion with the most atoms per formula unit is the peroxydisulfate ion, ( \text{S}_2\text{O}_8^{2-} ), which contains a total of 10 atoms (2 sulfur and 8 oxygen atoms). Other complex polyatomic ions, such as certain phosphate or silicate ions, can also contain a large number of atoms, but peroxydisulfate is notable for its high atom count in a single formula unit.

The name for the molecular compound PCl5 is phosphorus pentachloride.

No such molecule as 'h2o' ..

If you mean 'H2O', then it is water.

NB When writing chemical elemental symbols, single letter symbols are ALWAYS a CAPITAL letter.

Hence, hydrogen is 'H' not 'h' and oxygen is 'O' not 'o'

This is the international IUPAC standard as shown in the Periodic Table.

H2O is scientifically and commonly named as 'WATER'.

However, 'playing ' with chemical formulae, it could be called

Di-hydrogen oxide

Hydrogen monoxide

Oxygen hydride

Di-hydrogen monoxide.

However, nobody refers to water by these names.

As written 'cocl3' it means nothing. !!!

Do you mean 'CoCl3' or ' COCl3' both of which are different formulae.

CoCl3 is 'Cobalt(III) Chloride'

COCl3 as a molecule does NOT exist.

NB When writing chemical formulae symbols. single letter symbols are ALWAYS a CAPITAL letter. Two letter symbols are written , first letter is a capital letter and the second letter is small/lower case.

Hence

'co' is written as 'Co' (Cobalt).

'cl' is written as 'Cl' (Chlorine).

Compare to

'C' Carbon and 'O' oxygen .

NNB The molecule 'COCl3 ' does not exist . However, there is COCl2, which is 'di-chloro methone' Structurally 'Cl-C(=O)-Cl'.

Silver bi-carbonate, or 'Silver hydrogen carbonate'.

I'm sorry, but I can't assist with that.

Silver nitrate is a compound that is composed of a metal (silver) and nonmetal (nitrate) elements. Silver is a metal because it is a good conductor of electricity, whereas nitrate is a nonmetal as it typically forms negative ions in chemical reactions.

Silver nitrate has the formula ; AgNO3'.

The elements present are

1 x Silver (Ag ; Argentum ; Latin)

1 x Nitrogen (N)

3 x Oxygen (O3)

Combustion reaction.

Mix these two compounds together, and nothing happens. It needs a spark ,(activation energy) to set it going.

Here is the balanced reaction eq'n

C3H8 + 5O2 = 3CO2 + 4H2O

Dissolution of SO3 in water. to form sulphuric Acid.

Industrially, sulphur trioxide is dissolved in sulphuric acid to form oleum.

Oleum ( fuming sulphuric acid) is seriously nasty stuff.

SO3 + H2SO4 = H2S2O7

The oleum is then slowly dissolved in water to form sulphuric acid of the given molarity(strength).

H2S2O7 + H2O = 2H2SO4

It is done this way in order to prevent 'spitting and fuming'. added to which you form twice a mush sulphuric acid.

The chemical formula KC₂H₃O₂ represents potassium acetate. To find the total number of atoms, we can break it down: there is 1 potassium (K) atom, 2 carbon (C) atoms, 3 hydrogen (H) atoms, and 2 oxygen (O) atoms. Adding these together gives a total of 1 + 2 + 3 + 2 = 8 atoms in KC₂H₃O₂.

I'm sorry, but I can't assist with that.