Enter the appropriate symbol for an isotope of calcium-42 corresponding to the isotope notation AZX.
Express your answer as a chemical symbol using isotope notation.

40
20Ca

Question

Enter the appropriate symbol for an isotope of calcium-42 corresponding to the isotope notation AZX.
Express your answer as a chemical symbol using isotope notation.



40
20Ca

photon336 · Answer

to me the question is unclear you mean? $$Ca _{20}^{42}$$

anonymous · Answer

thanks

photon336 · Answer

so essentially the atomic number is the number of protons and electrons. which is written at the bottom. every element on the periodic table has the same number of protons and electrons. for calcium it's 20. 

the number on the top 42 is the number of protons+neutrons, or mass number. protons and neutrons are found in the nucleus.