Group names isotope position

When the isotope position is specified by a group name that is part of the parent compound, italicize the group name. 

The Group lA elements (Li, Na, K, Rb, Gs, and Fr) are called the alkali metals. The name alkali derives from an old word meaning ashes of burned plants. All the alkali metals are soft enough to be cut with a knife. None are found in nature as free elements, because all combine rapidly and completely with virtually all the nonmetals and, as illustrated in Figure 3.14, with water. These elements form positive ions (cations) with a +1 charge. Francium, the last member of Group lA, is found only in trace amounts in nature, and all its 21 isotopes are naturally radioactive. 

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