how do i work out protons neutrons and electrons when the element is set out like this tellurium -122?

Question

i know how to do it normally just not this way so help me out :)

Answer 1

the number of protons dictates the element. tellurium always has 52 protons. that is the atomic number on the periodic table.

the number of electrons = number of protons in a stable atom. ie electrons = 52.

the atomic mass = mass of protons, neutrons, and electrons. but the mass of 1 proton = mass of 1 neutron = 1000 times the mass of an electron (the electron is very very small compared to the other two) and is generally ignored. so the atomic mass can be thought of as the mass of protons + neutrons. Since both protons and neutrons have mass of "1 amu", the atomic mass listed = number of protons + number of neutrons.

122 is the atomic mass of that isotope. (an isotope by the way is an element with different numbers of neutrons - Te has 30 known isotopes all with 52 protons + varying number of neutrons). any 122 - 52 = number of neutrons = 70

Answer 2

The normal 'Stable' atom of Tellurium is Te128.
Te122 is therefore an isotope having 6 Neutrons less but is also stable..
The Atomic Number of both is 52.
This means that Neutrons in Te122 = 122 - 52 = 70.
And, in Te 128 = 128 - 52 = 76.
Electrons = the number of Protons = 52.

Answer 3

Tellurium - 122 is just another way of showing the atomic mass.
122 is the sum of the protons and the neutrons.
From the Periodic Table :-
Tellurium is atomic number 52, it has 52 protons and 52 electrons.
Tellurium has atomic mass of 128, it has 52 protons and 76 neutrons.
This is the most stable isotope.!!!!

In your sample Te -122 is an isotope, it has a different number of neutrons. Its atomic mass is 122 and has 52 protons and 70 neutrons.

Answer 4

You need to look up the atomic number of Tellurium - that's the proton & electron count. Then subtract that from the isotope number (122) to get the neutron count.