IT is about berylium element. it is in the S block.
The number of protons determines the atomic number. Since there are for protons, the atomic number is four, and the element is beryllium, symbol Be. The atomic mass number is the number of protons plus neutrons, so in this case it is 9. There are an equal number of protons and neutrons, so there is not charge. The symbol looks like this:94Be
ClO4- Note that this is not an "element" and hence doesn't have an "element symbol."
The symbol of helium is he
There is no element with symbol a or A even
Xenon; symbol is ' Xe ', as found in the periodic table.
Take the element "Iron" then the symbol for the element is "Fe" and "Fe" is also the symbol for a single atom of the element in a chemical equation.
O is the the symbol of the element oxygen.
B is the symbol for which element?Boron
The symbol for the element Terbium is Tb
The element symbol for barium is Ba.
If you meant "element" as in a chemical element, there is no element with the symbol "ef" in the periodic table.
Potassium, with an Atomic Number of 19, is designated by the symbol 'K'.