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I assume you mean the small numbers written under the letters that are the element symbol.
The one on the bottom left is the "Atomic Number" and is the number of Protons in the nueclus of the atom, this is what makes an element unique.
1H indicates that Hydrogen has only one proton and is "Atomic Number" one, these numbers are not normally written in unless it's relevent to whatever is being discussed.
If the symbol is in a formula for a more complex molecule then there might be a number on the bottom right of a symbol - this is an indication of how many of this atom are in the molecule. so Water is H2O the two indicating there are two hydrogens in the structure.
There are also numbers above, on the left the "Atomic Mass" being the total number of Protons and Neutrons in the element. Top right being the "Charge" if any (this would make it an Ion)
What else can I help you with?
The short way of writing an element is called its?
Symbol (southwest high school Sophomore MN)
What is the element symbol of oxygen?
O is the the symbol of the element oxygen.
Is there a element ef?
If you meant "element" as in a chemical element, there is no element with the symbol "ef" in the periodic table.
What is Calciums origin element's name and symbol?
Calcium is an element, it's symbol is Ca, and like everything else except for hydrogen it was formed by nuclear fusion in the heart of a star which has since blown up.
What is the element symbol of einsteinium?
The chemical symbol of einsteinium is Es.
What is a number written to the right of a chemical symbol?
a subscript Number of atoms of that element in the molecule.
What does the medical abbreviation SC mean?
SubcutaneousSC = subcutaneousSubcutaneous (under the skin)When written as 's.c.', it refers to the abbreviation for subcutaneous, meaning beneath the skin. When written as 'Sc', it is a symbol for scandium which is a metallic element.
When the symbol of an element consists of 1 letter what is it called?
It is called a chemical symbol.
Why is the number placed below an element symbol in a chemical formula is called a subscript?
The number placed below an element symbol in a chemical formula is called a subscript because it indicates the number of atoms of that element in a molecule or compound. The subscript is written slightly below the element symbol to differentiate it from the coefficient, which applies to the whole molecule or compound.
What is the symbol for 12p 10e 12n?
The symbol for an element is typically written as [A-Z][a-z][number], where A is the element's atomic number, Z is the element's chemical symbol, and the number represents the sum of protons and neutrons (called mass number). So, for 12 protons, 10 electrons, and 12 neutrons, the symbol would be Mg.
What element was origanally called wolfram?
Tungsten. Its symbol, however, is still W.
What is the chemical symbol for a bone-building element called?
If you think to calcium the symbol is Ca.
What is the fifth element called?
The fifth element on the periodic table is boron, which has the symbol B.
What is a one or two letter representation of an element called?
This is known as the chemical symbol for the element.
What is an One or two letter representation of an element is called?
This is known as the chemical symbol for the element.
What is one or two letters called that represent an element?
The chemical symbol is one or two letters that represent an element.
What is a one or two lettered representation of an element?
That is the chemical symbol of an element, such a H for hydrogen, Hg for mercury, etc.
