4Be2+ or Be2+ cation.
Look at the periodic table. You see that the element that has 16 protons is Sulfur. Electrons have a single negative charge, while protons have a single positive charge, so an ion with 2 more electrons than protons will have a charge of 2-. So, the symbol of the ion would be S2- .
Electrons have a negative charge. Thus, a species with more electrons than protons will have a negative charge. The compound with 20 protons and a minus two charge must therefore have 22 electrons.
The symbol for this ion is As3-. The charge is 3- because there are three more electrons than protons.
A lithium ion has three protons and 2 electrons - Li+. A neutral lithium atom has 3 electrons, but loses one to form an ionic bond with a non-metal.
A neutral calcium atom that loses two electrons has a +2 charge.
Number protons equal to atomic number. So the element is Helium
+2: 26 - 24.
Look at the periodic table. You see that the element that has 16 protons is Sulfur. Electrons have a single negative charge, while protons have a single positive charge, so an ion with 2 more electrons than protons will have a charge of 2-. So, the symbol of the ion would be S2- .
find the difference between the number of electrons and protons, and then find whether protons(+) or electrons(-) are more abundant. if the difference was 2, for example, and there were (2) more protons than electrons, the charge would be written as: chemical symbol 2+
The alpha particle is a helium nucleus. Its symbol is 24He2+, meaning 2 protons, 2 neutrons, and no electrons.
108Sn+2
The symbol for this ion is As3-. The charge is 3- because there are three more electrons than protons.
Electrons have a negative charge. Thus, a species with more electrons than protons will have a negative charge. The compound with 20 protons and a minus two charge must therefore have 22 electrons.
The symbol for an alpha particle is 24He2+. The first 2 means that there are 2 protons. The second 2+ means that the net charge is +2, which means, since there are 2 protons, that there are no electrons. The result is that an alpha particle is a helium nucleus without its electrons, i.e. 2 protons and 2 neutrons, but no electrons.
A lithium ion has three protons and 2 electrons - Li+. A neutral lithium atom has 3 electrons, but loses one to form an ionic bond with a non-metal.
Magnesium, with a +2 charge.
S for sulfur because the number of protons tells you the atomic number with is 16 and 16 is sulfur. The electrons means it is an ion with two more electrons than protons. The neutrons have no charge but add mass to the element.