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.
In the usual atomic notation, proton number is on the bottom. The top number is the mass number (protons plus neutrons).
it is the total mass of the element.
the bottom!
So, all you have to look at is at the atomic number of the elements on the periodic table, which it is at the top of the symbol on the P.T, and that is the number of protons and electrons! Now, to find the number of neutrons, you have to find the number at the bottom of the element symbol called the atomic mass no. and you take away that by the top number.
If you think to the number of protons in an element atom this number is equal to atomic number of this element. The calculation of the mass of the proton and other properties are another questions and problems.
The atomic number is the number of protons in the nucleus of one atom of the element.
Iodine has 53 protons. The number of protons is equal to the atomic number which is the number at the top of each element that is bolded.
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.
If you use 24He notation then the bottom number in the number of protons and electrons and the top number minus the bottom number is the number of neutrons
If you mean the 146C, the bottom number (6) indicates the total number of protons. This is always 6 in the case of carbon. The top number is the sum of protons and neutrons, which for this particular isotope is 14 (i.e., carbon-14 has 8 neutrons).
If you are asking about the numbers shown on elements the larger of the two numbers is the Mass Number ( the number of protons and neutrons added together) and the smaller number is the Atomic or Proton Number (the number of protons) Top and bottom are also properties of Quarks along with Up & Down and Strange & Charm Science-teacher
The atomic number increases, because as you move from top to bottom, you are adding protons to the nucleus, and atomic number is the number of protons.
The top left number is the mass (neutrons&protons) and the bottom left number is the atomic number(protons)
The top number is 14 and the bottom number is 6. The latter is the same for any isotope of carbon, but the top number changes with the number of neutrons in the isotope, because the top number is the mass number, which is defined to be the sum of the numbers of protons and neutrons.
The protons are at the center of the atom. An atom does not have a top or bottom.
On a periodic table, each symbol has 2 numbers next to it. The top number is the mass number and the bottom number is the proton number.
So, all you have to look at is at the atomic number of the elements on the periodic table, which it is at the top of the symbol on the P.T, and that is the number of protons and electrons! Now, to find the number of neutrons, you have to find the number at the bottom of the element symbol called the atomic mass no. and you take away that by the top number.
it depends on which atom it is but you can figure out the number by looking at the periodic table. for example, sodium Na has an atomic mass of 11 (top no.) and a relative atomic mass of 23 (bottom no.), the top number represents the number of protons (and electrons as they are in equal amount) and the bottom number represent the number of neutrons and protons, so, if you take these away from each other you will be left with the number of neutrons the atom has. hope this helps :)
Look at the periodic table.The bottom number on an element is the number of protons. The number of electrons will be the same. Subtract the bottom number from the top number to get the number of neutrons. e.g: 103 Rh 45 Protons= 45 Electrons= 45 Neutrons= 58 (103-45)
As you move from left to right on rows, or across periods and top to bottom, or down a group, the number of protons increases.