Number of electron in As3+ ion?

Look up the electron configuration. It is

1s2 2s2 2p6 3s2 3p6 3d10 4s2 2p3, The 3+ ion is made by removing the last 3 electrons (the 4p3). So just count the electrons left. Another way to do this, and it may be easier is to look up As on the periodic chart. Mine shows the atomic number as 33 so I know the neutral element has 33 electrons. If I make it 3+ by removing 3 electrons then what's left must be 33-3 = 30 in the 3+ ion.

Well, it seems like As3+ has three extra positive charges compared to the neutral As atom. So, to make up for the positive charges, we have to subtract three electrons from the neutral As atom. Therefore, the As3+ ion would have 33 electrons. But hey, don't worry, I heard As3+ ions make great dancers, always popping and getting positively charged up on the dance floor!

To determine the number of electrons in the As^3+ ion, we need to know the atomic number of arsenic (As).

The atomic number of arsenic (As) is 33, which means it has 33 protons.

Since the As^3+ ion is positively charged, it has lost 3 electrons from its neutral state.

Therefore, by subtracting 3 from the number of protons (33), we can determine the number of electrons in the As^3+ ion.

33 - 3 = 30

So, the As^3+ ion has 30 electrons.

To determine the number of electrons in the As3+ ion, we first need to understand the electronic configuration of neutral arsenic (As) atom.

The atomic number of arsenic (As) is 33, which means the neutral atom has 33 electrons. The electronic configuration of neutral As is:

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3

Now, let's determine the number of electrons that As3+ ion has by looking at its charge. The 3+ charge indicates that the ion has lost 3 electrons compared to the neutral atom.

So, to find the number of electrons in As3+ ion, subtract 3 from the original number of electrons:

33 - 3 = 30

Therefore, the As3+ ion has 30 electrons.