If an element has 56 protons, 82 neutrons, and 56 electrons, what are its symbol and mass number? ?

NetherCraft 0

How is an atom with 56 protons and 78 neutrons and 56 electrons related to the atom with the 82 neutrons?

6 Answers

  • They’re both called Barium because they both have 56 protons, but they’re different isotopes. The number of protons will always tell you what element it is; the only difference here is their atomic weight (the sum of their protons and neutrons). If you’re interested in the different chemical properties of Barium 138 and Barium 134, I suggest the “Isotopes of Barium” page on www.wikipedia.org as a good jumping off point.

  • The element is Barium

    mass number = protons + neutrons = 56 + 78 = 134

  • Element 82

  • 56*1 + 82*1 = 138 is the mass.

    56*1 + 56*(-1) = 0 is the charge.

    56 is the order.

  • Atomic quantity is the style of protons. which would be 26. Atomic mass = style of protons + style of neutrons = 26 + 30 = fifty six. internet cost = style of protons – style of electrons = 26 – 23 = +3 so as meaning the respond is A.

  • mass no 138….symbol Ba

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