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Elements and Compounds
Questions about the properties and characteristics of elements as observed in nature and in compounds. Chemical formulas are also converted to and from symbols in covalent or ionic bonds. All the questions you want to ask about the elements and the compounds they form.
83,366 Questions
What is the chemical formula for calcium hydrogen sulfate?
No such molecule as 'calcium sulphate'. This name would suggest that the fomrula is ' CaHSO4. This does NOT exist because the internal charges do NOT balance.
Calcium sulphate is a chemical salt, that contains ;-
1 atom of calcium
1 atom of sulphur
4 atoms of oxygen
The formula is ' CaSO4 '.
Hydrogen sulphate is more commonly known as ' sulphuric acid'.
It contains ;-
2 atoms of hydrogen
1 atom of sulphur
4 atoms of oxygen /
The formula is ' H2SO4 '.
What is the name for the compound with the formula of ba0?
No such compound as ' baO'.
If you mean ' BaO' , the the name is ' Barium Oxide '.
NB All chemical symbols have as their first letter as a CAPITAL letter.
This is the IUPAC international standard.
If an atom has 18 protons 15 neutrons and 22 electrons what is the atoms electrical charge?
An atom of 18 protons is an atom of Argon, which is a Noble/Inert Gas.
Consequently being an inert gas it does NOT gain extra electrons.
So an atom of Argon does NOT have 22 electrons. It only has 18 electrons, . in order to remain neutrally charged. It does NOT form an ANION .
The number of protons indicates the element(name).
The number of neutrons indicates the isotopic mass.
What is aluminum overall charge of an atom?
The overall charge on an atom of aluminium is 'ZERO' . The number of protons equals the number of electrons.
What is the word equation for sulfur oxide?
No such compound as 'sulphur oxide'.
If you mean 'sulphur dioxide.'.
Then the word equation is
sulphur + oxygen == combustion==> sulphur dioxide.
S(s) + O2(g) == combustion ==> SO2(g)
To make sulphur trioxide
Sulphur dioxide + oxygen == catalyst==> sulphur trioxide.
2SO2(g) + O2(g == vanadium catalyst==> 2SO3(g)
Sulfur dioxide forms from the burning of what?
Elemental sulphur burned in oxygen (air) forms sulphur dioxide.
NO!!!!
On dissolution in water it forms Sulphurous acid (H2SO3)..
Compare with Sulphuric Acid (H2SO4), formed from the dissolution of SO3 in water.
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What 2 elements make calcium sulfate?
Correction !!!! It is THREE elements.
They are Calcium, Sulphur, and oxygen .
Is silver a metal or nonmetal or solid or liquid?
Silver is a solid metal at room temperature.
Over a period of week it will slowly oxidise to silver oxide (Ag2O) which is black in colour.
Is sodium a nonmetal or a metal or a solid or a liquid?
At room temperature sodium is a solid metal.
It is kept under an hydrocarbon , because it will readily react with oxygen.
Is CO2 a metal oxide or nonmetal oxide?
CO2 ( Carbon dioxide) is a non-metal oxide.
Remember carbon is a non-metal. Its allotrope ; graphite is black soot like solid.
Is sodium oxide metal or nonmetal?
Sodium oxide (Na2O) is a white crystalline structure. It looks a bit like common salt (sodium chloride).
It is NOT a metal.
Aqueous. (Dissolved in water) Example: CaCl2(aq)= Aqueous Calcium Chloride.
Tantalum is a dense, silvery metal that is highly resistant to corrosion and has a high melting point. It is often found in the form of greyish powder or dark metal in its natural state. Tantalum is used in various industrial applications due to its unique properties.
Is tantalum a metal a nonmetal or a matalloid?
Tantalum is a TRANSITION METAL.
It is in the Periodic Table of elements.
Elemental Symbol ; Ta
Atomic No. 73
Atomic Mass . 180.95
Colour ; Silver Grey
Phase ; Solid
M.P. ; 3017 oC
B.P. ; 5458 oC
Crystal Structure ; Body-centred Cubic.
What can a flame test tell you about a certain compound?
No, because non metal atoms do not enter an excited state.
Is NH3 an element compound or molecule?
NH3 ; Ammonia
It is NOT an element
It is a molecule consisting of two or more atoms.
It is a compound because it consists of two different atoms combined together.
Hence it is both a molecule and a compound.
Is hydrogen a molecule and or compound or element?
Hydrogen is an elemental gas.
It exists as the molecule ' H2 '. Structurally shown as ' H-H '.
NB Hydrogen does NOT exist as a monatomic gas.
It is NOT a compound. Compounds are combinations of atoms of different elements, e.g. water (H2O).
NB To avoid confusion. Molecules are two or more atoms combined together. They may be of the samer or different elements.
Compounds are molecules consisting of two or more DIFFERENT atoms combined together.
So molecules can be consist of two or more atoms
Compounds can be consist of two or more different atoms. Hence compounds are molecules, but molecules are not necessarily compounds ; subtle difference.
Why is hydrogen the 1st element?
Hydrogen is the first element because it has the simplest atomic structure with just one proton in its nucleus. This makes it have the smallest atomic number, which determines the element's position in the periodic table.
From the Periodic Table
The 'first element' is ;-
Atomic No. 1. . which is Hydrogen (H)
It has an atomic mass of '1'
Sodium
Symbol ; Na ( Nadium , Latin for sodium)
Atomic No. ; 11
Atomic Mass. ; 23
What is the element golds atomic number chemical symbol and element?
Gold
Atomic No. ; 79
Atomic Mass ; 196.97
Symbol ; Au ( Aurum ; Latin for gold).
Colour ; Metallic Yellow
Phase ; Solid
M.P. ; 1064 oC
B.P. ; 2856 oC
Crystal Structure ; Face-centred Cubic.
