The ordinal number of a chemical element is 13. What is this element? What is the charge of the nucleus of its atom?
| November 27, 2020 | education
The ordinal number of a chemical element is 13. What is this element? What is the charge of the nucleus of its atom? How many electrons, protons, neutrons are contained in its atom?
At number 13 in the periodic table of chemical elements is aluminum.
The charge of the nucleus is equal to the ordinal number, hence 13.
The number of electrons is equal to the ordinal number, hence 13.
The number of protons is equal to the ordinal number, hence 13.
To find the number of neutrons, you need to subtract the ordinal number from the element’s atomic mass. The atomic mass of aluminum is 27.
27-13 = 14. The number of neutrons is 14.
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