… A sodium atom can lose its outer electron. Why does Na ion have a +1 charge?Ī sodium atom has one electron in its outer shell. An atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.
It is charged because the number of electrons do not equal the number of protons in the atom or molecule. What is ion charge?Īn ion is a charged atom or molecule. The symbol for the ion is Mg 2 +, and it is called a magnesium ion. Thus, a magnesium atom will form a cation with two fewer electrons than protons and a charge of 2+. What are the 7 groups in the periodic tableĪ magnesium atom must lose two electrons to have the same number electrons as an atom of the previous noble gas, neon. What are the 7 groups in the periodic table? Metal ions may have other charges or oxidation states. Group I (alkali metals) carry a +1 charge, Group II (alkaline earths) carry a +2, Group VII (halogens) carry -1, and Group VIII (noble gases) carry a 0 charge. Which group in the periodic table has an ion of a charge? Non-metals (found on the right) will be negative. On the Periodic Table metals (found on the left of the table) will be positive. To find the ionic charge of an element you’ll need to consult your Periodic Table.
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