Known as alkaline earth metals, they tend to ionize by Over here in Group Two, and Group Two elements, also Periodic table to confirm that it's likely that calcium So that's a pretty good clue that calcium is going All right, so theĬonvention is that we write the positive ion first and Inspired, pause the video and see if you can come Let's now see if we can come up with the chemical formula for the ionic compound calcium bromide. The elements in the middle of the periodic table, the transition metals, are odd in that they have the potential of taking on several possible positive charges. And the groups further to the right tend to take on negative charges to become anions because they like to accept electrons now instead of donate them.Ĭollectively these elements in groups 1-2 & 13-18 are known as main block elements and have (usually) constant charges. Elements in group 14 have the possibility of taking on a +4 or a -4 charge. Elements in group 13 take on a +3 charge. Elements in group 2, the alkaline earth metals, take on a +2 charge for a similar reason. Elements in group 1, the alkali metals, have one valence electrons so they tend to lose that one electron and take on a +1 charge. It corresponds to how many valence electrons those elements in that group have and therefore how many they wish to donate to other atoms to form cations. For the most part it depends on the group (column) in which the element is found in on the periodic table.
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