All you need is a periodic table. The atomic number of an element is the number of protons in the nuclei of all of the atoms of that element. So just look for the element on the periodic table, and its atomic number is the number of protons. However, if you don't have a periodic table available, and you've been given mass number, number of neutrons, and/or the number of electrons, you can calculate the number of protons by doing the following:
mass number - no. of neutrons = no. of protons
no. of electrons in a neutral atom = no. of protons
The ratio of neutrons to protons in an atom can be calculated by subtracting the atomic number (number of protons) from the atomic mass (sum of protons and neutrons) of the atom. Mathematically, ratio of neutrons to protons = (Atomic mass - Atomic number).
The number of protons in an atom.
Find the atomic number. That tells you the number of protons and electrons (in a neutral atom). Then find the atomic weight. The number of protons plus the number of neutrons will equal the atomic weight. So if you know the wt. just subtract the number of protons and you will have the number of neutrons.
To find the number of protons (atomic number), you can use the number of electrons, in this case 12 electrons. Since atoms are electrically neutral, the number of protons is equal to the number of electrons, which is 12. To find the mass number, you add the number of protons and neutrons together. In this case, you have 12 protons and 10 neutrons, so the mass number would be 22.
To find the number of protons in sodium-23, refer to the atomic number of sodium from the periodic table. Sodium has an atomic number of 11, which tells you that it has 11 protons. Sodium-23 specifically refers to the total number of protons and neutrons in its nucleus, so it still has 11 protons.
The number of protons is the atomic number.
The number of protons is equal to the number of electrons and the atomic number.
The ratio of neutrons to protons in an atom can be calculated by subtracting the atomic number (number of protons) from the atomic mass (sum of protons and neutrons) of the atom. Mathematically, ratio of neutrons to protons = (Atomic mass - Atomic number).
The atomic number of the element is the number of protons, therefore there has to be the same amount of electrons to protons.
# protons = atomic number.
The number of protons in the atomic nucleus is equal to atomic number.
The number of protons in an elements nucleus is the same number at the atomic number.
The number of protons is equal to atomic number: neon 10 has protons.
atomic number is the number of protons in the atom. mass number is protons and neutrons combined.
The number of protons in an atom.
There are 54 protons in the nucleus of xenon. You can find the number of protons of any element on the periodic table by noting the atomic number of the element. The atomic number is the same as the number of protons.
It is the same as the number of protons if it is a neutral atom, or the number of protons plus the charge of the ion. The number of protons is the atomic number of the element.