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Haw to determine the no. of electrons protons and neutrons in an atom? |
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Answer» find a periodic table ONLINE or in a CHEMISTRY book.In tests, normally, a periodic table will be provided...Using the group (columns) or period (rows) can make the element easier to locate on the table.You can also search the table for the symbol of the element if you don’t know any other propertiesFor example, boron (B) has an atomic number of 5, therefore it has 5 protonsFor example, boron (B) has an atomic number of 5, therefore it has 5 protons and 5 electrons.However, if the element includes a negative or POSITIVE ion, then the protons and electrons will not be the same. You will have to CALCULATE them. The ion number will appear as a small superscript after the elementMake sure that you round the atomic mass to the nearest whole number. For example, the atomic mass of boron is 10.811, but you can just round the atomic mass up to 11.For our boron example, 11 (atomic mass) – 5 (atomic number) = 6 neutrons |
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