Thanks got through all but one
Element P has an atomic number of 92 and atomic mass of 238. Element s has 92 protons and 143 neutrons.
atomic number and protons are the same would htese two elements be an isotope or different elements
They would be isotopes. Both have atomic number the same, as you point out, so both must be uranium (or the same element as you say). Calculate the mass. Remember mass is number protons + number of neutrons and is the mass number. The first one is listed as 238. The second one requires that you add 92 protons and 143 neutrons = 235 mass number). So one has a mass number of 238 the other one has mass number of 235. Elements having the same atomic number but different mass numbers (or elements with the same atomic number but different number of neutrons) are isotopes.
Two elements with the same atomic number (number of protons) would be different isotopes of the same element. In this case, both elements, P and S, have the same atomic number of 92, which means they have the same number of protons. However, they have different atomic masses, with element P having an atomic mass of 238 and element S having an atomic mass of (92 + 143 =) 235. Therefore, P and S are different isotopes of the same element.
To determine whether the two elements P and S are isotopes or different elements, we need to compare their atomic masses.
Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons. So, if elements P and S have the same atomic number (which is equal to the number of protons), they can potentially be isotopes.
The atomic mass of element P is given as 238, while element S has 92 protons and 143 neutrons, adding up to a combined atomic mass of 235 (92 protons + 143 neutrons = 235).
Since the atomic masses of P and S are different (238 and 235, respectively), they are not isotopes. Rather, they are different elements with similar atomic numbers.
So, element P with an atomic number of 92 and atomic mass of 238 is a different element from element S, which has 92 protons and 143 neutrons and hence an atomic mass of 235.