Ask Question
13 January, 19:48

Un elemento posee dos isótopos cuyos números de masa suman 68 y la semisuma de sus neutrones es 19. Determine el grupo de este elemento en la Tabla Periódica Actual.

+4
Answers (1)
  1. 13 January, 23:46
    0
    The element belongs to group 15 of the present periodic table

    Explanation:

    Isotopes have the same proton number, what differs is that they have different number of neutrons.

    Now since the half-sum of their neutrons is 19, the total number of neutrons would be 19 * 2 = 38 neutrons.

    Also, their masses add up to be 68, since the total mass equals sum of neutrons and sum of protons, this means that the total number of protons is 68-38 = 30

    Since this is equal in both isotopes, this means that the proton number of the element is 30/2 = 15

    The atomic number is the number of protons in the nucleus of an atom. Since the atomic number is 15, this element is phosphorus and it belongs to group 15 of the present periodic table
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “Un elemento posee dos isótopos cuyos números de masa suman 68 y la semisuma de sus neutrones es 19. Determine el grupo de este elemento en ...” in 📘 Chemistry if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers