For determination of quantity of protons find the element of the table of Mendeleyev displaying properties of this atom in atom. Its serial number in the table will also display number of protons in an atomic nucleus. The quantity of protons can be found, knowing an atomic nucleus charge and also quantity of electrons in it.
It is required to you
- Mendeleyev's table.
Instruction
1. Determination of quantity of protons by means of the table MendeleevaNaydite in Mendeleyev's table chemical element which corresponds to the studied atom. Define its serial number in this table. In the standard table the serial number of an element is displayed in the top part of a cell where chemical element and its properties is written down. Serial number of chemical element which describes atom is equal to quantity of protons in it. For example, if serial number of oxygen 8, then the quantity of protons is equal in atom of oxygen to 8.
2. Determination of quantity of protons in izotopakhpr the description of any isotope is used record which consists of the sign of chemical element which isotope is and also couples of numbers, one of them registers in the form of the top index before the sign of an element, and the second in the form of the lower index before the sign of an element. Take the lower number which is written down before the sign - it shows a charge of a kernel and is quantity of protons which contains in it, so and atom of this isotope.
3. Definition of number of protons in atom by quantity of an elektronovesla is known quantity of electrons in the studied atom, just write down it - it is and will be to quantity of protons which contains in it.
4. Determination of quantity of protons by quantity of a neytronovesla is known quantity of neutrons in atom and its atomic mass (in atomic units of mass), take away number of neutrons from weight - the result will be equal to quantity of protons in atom.
5. Determination of quantity of protons the atomic nucleus charge is known for a charge of a yadrayesla, transfer it to Pendants (in case it is not given in these units) then divide into a charge of one proton which makes 1.6022*10^-19. Private it will be equal to quantity of protons in atom. If result - not an integer, round it to the next whole.