Fill in the blank for protons, neutrons, electrons, and charge

Question

Fill in the blanks in the chart below with the symbol, mass number, number of protons, neutrons and electrons and charge.

When you enter the charges, enter them after the number, i.e. 2+ or 3-.Symbol	mass number	protons	neutrons	electrons	charge
O	16			10
			28	23	0
		16	17		2-
Cr			28		6+

Answer 1

The mass number is the number of protons + the number of neutrons. The number of protons defines the element and is obtained from the atomic number. The number of electrons in a neutral atom = the number of protons. If there is a + or - charge making an ion, the charge is = #protons - #electrons.

When you enter the charges, enter them after the number, i.e. 2+ or 3-.Symbol	mass number	protons	neutrons	electrons	charge
O	16	8	8	10	2-
V	51	23	28	23	0
S	33	16	17	18	2-
Cr	52	24	28	18	6+

Note that S-33 is an isotope of S-32 because it has 16 protons and 17 neutrons. S-32 has 16 protons and 16 neutrons.

Answer 2

Looking at the first row:

We know that protons and electrons are equal to one another, in a normal atom. This can be found by looking at the elements atomic number, oxygen has an atomic number of 8, meaning that it has 8 protons. Here we see 10 electrons, which means that we have 2 extra electrons as we should have 8. This will effect our charge.

Using this, oxygen usually has a charge of -2 (can be found by looking at its location on the periodic table, the row in which it lies has a -2 charge). With two extra electrons, it has a charge of -4.

The mass number consists of your protons plus your neutrons. Our mass number here is 16. 16-8 protons means we have 8 neutrons. The number of protons in an element will not change, however the number of neutrons and electrons can, as seen in this example.

I hope this information helps with the remaining parts of the table