How do you figure out the number of electrons, neutrons, and protons of an element by only being given the mass?

2 answers:

8 0

Well there is the same amount of electrons as protons and if you add the number of protons and neutrons together you get the atomic number.
the number of protons is roughly half that of the atomic number but not all the time so i dont know how to find it just from the atomic mass but if you have a periodic table you can look at the atomic mass and find which element it is and then do it from there also the atomic mass is the bottom numbers the protons are the top numbers of the atom in like 2
He
4

Irina18 [472]3 years ago

6 0

<span>Get a periodic table of elements. ...Find your element on the periodic table. ...Locate the element's atomic number. ...Determine the number of electrons. ...Look for the atomic mass of the element. ...<span>Subtract the atomic number from the atomic mass.</span></span>

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Use the periodic table to identify the element indicated by each electron configuration by typing in the

EleoNora [17]

Answer:

1s22s22p6: Neon (Ne)

1s22s22p63s23p3: Phosphorous (P)

1s22s22p63s23p64s1: Potassium (K)

1s22s22p63s23p64s2(im not sure what 308 is supposed to be): Calcium (Ca)

1s22s22p63s23p64s23d104p65s24d3: there is no pure element that ends 4d3 that I know of so this can either be Zirconium(Zr) if it ends in 4d2 or Niobium (Nb) if it ends in 4d4

Explanation:

you can look at the periodic table and the trends to find the rough idea of where the electron configuration ends, there are helpful articles and images on these, i attached an image that may help. After that you can look at the atomic number to find the number of electrons for a pure element and use the electron subshell pattern thing to find the exact number