Answer:
Explanation:
molecular weight of gold = 197
converting 10.2 g into moles
no of moles = 10.2 / 197
= .0518 moles
one mole of any element contains 6.02 x 10²³ number of atoms
.0518 moles will contain 6.02 x .0518 x 10²³ atoms of gold
= .311 x 10²³ no of atoms of gold .
= 3.11 x 10²² no of atoms of gold
The noble gas notation is as follows- you must start with the noble gas that is before the element which in this case is Krypton and then from there you continue the electron configuration as follows- [Kr] 5s^2 4d^10 5p^2
I think they orbit around the atom
342.14 g/mol
Molar mass of Al= 26.98
Molar mass of S=32.06
Molar mass of O=16.00
(26.98)2+(32.06+(16.00×4))3=342.14
Answer:
Sodium has 1 valence electron and bismuth has 83 electrons (5 valence electrons)
Explanation: