The need to remove two electrons in order for the material to react means more energy is needed for electron removal. The Group 2 elements tend to be less reactive than their Group 1 counterparts.
However, radium is a radioactive element and is generally under the category of radioisotopes in addition to being an alkaline earth metal, because it is not a stable element. Alkali metals are the six elements which belong to the group 1 of the periodic table and are found in the leftmost column. See also Advanced A Level Notes: sblock Gp 1 Alkali Metals & Gp2 Alkaline Earth Metals. Hint: We need to know what are the alkali metals and alkaline earth metals and study the solubility and thermal stability of their carbonates and nitrates accordingly. GCSE Chemistry Notes: The Group 1 Alkali Metals Li Na K etc. Alkali metals belong to the s-block elements occupying the leftmost side of the periodic table.Alkali metals readily lose electrons, making them count among the most reactive elements on earth. Radium (atomic number 88) has similar properties to barium and is also in the Group 2 category. Also covered are explaining the group I alkali metal reactivity trend, uses of the alkali metals and alkali metal compounds. The reaction between magnesium and water is usually slow because magnesium readily reacts. The reactivity of alkaline earth metals tends to increase when moving from the top to the bottom of the group 2 elements (or moving from top to bottom in column 2 of the periodic table. In each case, when the metal reacts with water, it loses an electron to make a metal ion. This is best illustrated by the reactions with water we have just looked at. \) (Credit: Ingmar Runge Source: (opens in new window) License: Public Domain) Trends in Reactivity of Group 2 Elements (alkaline-earth metals). Reactivity increases as you go down the group.
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