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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
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.
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.
What is the atomic number of an atom of an element with 5 protons and 6 electrons?
Disregard the electrons, as their relative mass is insignificant to that of protons and neutrons. To find atomic mass, add the numbers of protons and neutrons: 5 + 6 = 11 is the mass number.
Why does the element gold have the symbol au?
'Au' is short for 'Aurum' , which is the Latin name for 'Gold'.
Similarly ; -
Ag ; Argentum ' Silver
Hg ; Hydragyrum 'Mercury'
Cu ; Cuprum . Copper
Na ; Nadium . Sodium
K ; Kalium ' Potassium
NB When science cannot give a modern name for something, it falls back on the Classical Languages.
What two compounds can iron form with chlorine?
Iron(II) chloride ; Ferrous chloride
Iron(III) chloride ; Ferric chloride.
It all depends on the oxidation state of iron.
What is the word equation for iron plus chlorine equals Iron chloride?
You have written the word eq'n for yourself.
Iron + Chlorine = Iron Chloride.
What is the compound name for C2H4Br2?
There are tqwo possibilities/ They are
-
1,1,-dibromo ethane ( CHB2-CH3 ) .
-
1,2- dibromo ethane ( CH2Br-CH2Br ).
What is the name compound for BaSO5?
No such compound as ' BaSO5 '.
If you mean ' BaSO4 '. it is barium sulphate.
What ionic compound is formed when zinc reacts with hydrochloric acid?
Zn + HCl ---> ZnCl2 + H2
ZINC CHLORIDE IS THE ANSWER
What element is formed when hydrogen nuclei fuse together?
When hydrogen nuclei fuse together, they can form helium. This fusion process is the energy source for stars, including our sun, where hydrogen nuclei combine to form helium through a series of nuclear reactions.
Do helium and hydrogen bond together?
NO!!!!
Helium is the MOST inert element, AND DOES NOT REACT WITH ANUTHIMG.
Are hydrogen oxygen and helium elements?
Yes, hydrogen, oxygen, and helium are elements. They are all pure substances made up of only one type of atom. Helium is the second lightest element, hydrogen is the lightest, and oxygen is the third most abundant element in the universe.
