Are you talking about the number below the symbol? If so, that's the Atomic Mass number.
For a given isotope of an element, the "top number" (e.g. 14C or carbon-14) is the atomic mass number, the total of neutrons and protons. The bottom number, if displayed, is the atomic number (e.g. 6C all isotopes of carbon have 6 protons). To find the number of neutrons, subtract the atomic number from the isotopes atomic mass number. Here, 14C will have 8 neutrons, and the result is that it is an unstable radioactive isotope. Many stable elements, however, have many more neutrons than protons.
The numbering arrangement of elements is called the atomic number. Atomic number determines the number of protons in an element's nucleus and defines its unique chemical properties.
Isotopes - atoms with the same atomic number, number of protons and number of electrons
Everything is made up of atoms. An atom is the smallest amount you have have of an Element (you find these on the periodic table of elements) The atom is made of a nucleus and shells. Inside the nucleus are protons and neutrons. And in the shells are electrons.
The element with an atomic number of 112 is called Copernicium. It is a synthetic, radioactive element that can only occur in a laboratory.
The little number immediately to the right of each element in a compound is called a subscript. It indicates the number of atoms of that element present in the compound.
The little number under the Element symbol is known as the Atomic Number. The Atomic Number represents the number of protons located at the atom's nucleus. It also tells how many electrons are in the atom, considering the atom is a stable particle, the number of electrons and protons are equal in an atom at its normal state.
the number of protons in an element is called the atomic number and there is no way to see how many electrons an element has.
they are called negative numbers. you show them like this. 3,2,1,0,-1,-2,-3,-4-------------------------------------------------If you are referring to fractions then the top number is called the numerator and the bottom number is called the denominator.---------------------------------------------------A little number like the 2 in the following expression"x2" is called a subscript.
The atomic number of the element is the subscript (bottom number) and the mass number is the superscript (top number); and both those numbers are written to the left of the element symbol.
The number on the bottom of a fraction is known as the "denominator."
the answer is that it is called a atomic number.
For a given isotope of an element, the "top number" (e.g. 14C or carbon-14) is the atomic mass number, the total of neutrons and protons. The bottom number, if displayed, is the atomic number (e.g. 6C all isotopes of carbon have 6 protons). To find the number of neutrons, subtract the atomic number from the isotopes atomic mass number. Here, 14C will have 8 neutrons, and the result is that it is an unstable radioactive isotope. Many stable elements, however, have many more neutrons than protons.
atomic number
The Atomic Number
They are called isotopes,
the number of protons in an element is called the atomic number and there is no way to see how many electrons an element has.