Question

What is the atomic number and mass number of element X, given that it contains 18 electrons and 20 neutrons? Additionally, can you identify the name of element X based on this information?

Answer 1

The atomic number of Element X is 18 and the mass number is 38. Given these characteristics, Element X can be identified as the isotope Argon-38.

Step-by-step explanation:

The atomic number of an element is equal to the number of protons or electrons in an atom. Given that element X contains 18 electrons, we can conclude that the atomic number of element X is 18. The mass number of an element, on the other hand, is calculated by adding the number of protons (or atomic number) to the number of neutrons. In the case of element X, given that it has 20 neutrons, plus 18 protons (based on the atomic number), we find that the mass number of element X is 38. Based on these attributes - atomic number 18 and mass number 38 - element X can be identified as Argon (isotope Argon-38) as per the Periodic Table of Elements. Thus, the atomic number and mass number of element X are 18 and 38 respectively, and element X is Argon (Argon-38).

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