Chromium's atomic number is 24. A neutral atom of chromium would thus have 24 protons and 24 electrons. Since we're dealing with Cr3+, though, we need to subtract 3 electrons from this number, giving us 21.
In Cr+3 ion there are only three electrons because during oxidation one from 4s orbital and two from 3d orbitals have been lost.
A chromium ion has the atomic number 24. This means that a neutral atom has 24 electrons. Because it has the net charge of positive three, it has 21 electrons.
There are 5 electrons in the d orbital of an Os3+ ion.
For a neutral (uncharged) atom, the total number of electrons is equal to the atomic number (number of protons). This would be the sum of the core electrons plus the valence electrons.
Pb which is neutral has 82 electrons. Thus, if it has a 4+ charge, then it has 78 electrons.
3 electrons total. electrons is the number on the top right corner with the plus sign indicating that electrons are positive.
For PBr4^+ you have...Valence electrons in P = 5Valence electrons is Br = 7 and there are 4 of them so total = 28This gives a total of 33, but you subtract 1 because of the + charge on the ion,Thus total valence electrons shown in the Lewis dot will be 32.
There are 5 electrons in the d orbital of an Os3+ ion.
The Mg2 plus cation has 10 electrons.
For a neutral (uncharged) atom, the total number of electrons is equal to the atomic number (number of protons). This would be the sum of the core electrons plus the valence electrons.
Pb which is neutral has 82 electrons. Thus, if it has a 4+ charge, then it has 78 electrons.
3 electrons total. electrons is the number on the top right corner with the plus sign indicating that electrons are positive.
The total number of protons plus the total number of neutrons
Na+ will be a sodium atom that has lost an electron. Normally in atoms the amount of protons and electrons are equal, when you see a plus or minus charge on an atom its due to the loss or gain of electrons.
It has 39 electrons and ends in a d orbital. Now finish your homework :)
For PBr4^+ you have...Valence electrons in P = 5Valence electrons is Br = 7 and there are 4 of them so total = 28This gives a total of 33, but you subtract 1 because of the + charge on the ion,Thus total valence electrons shown in the Lewis dot will be 32.
Hg will have 80 electrons.
The number of electrons is 10.
Well, Al is Aluminium, which is 13. 13 + 3 is 16.