Answer to Question #121592 in Inorganic Chemistry for anam

Question #121592
On the periodic table, there are two numbers in the block for the element potassium, K: 19 and 39.098. What are the names of the numbers and what do they measure?
1
Expert's answer
2020-06-11T10:26:54-0400

19: Potassium (K) is the ordinal number of the element. It indicates how many electrons or protons there are in 1 Potassium (K) atom, i.e. there are 19 electrons and 19 protons. 

39.098: is the relative atomic mass of potassium. It represents the mass of 1mol (6.02 * 1023 atoms) of Potassium. it also means how many times greater than 1/12 of the weight of the C12 atom


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