Question
Alkali metals and Alkaline earth metals
✓
Answer
| Alkali metals | Alkaline earth metals |
| (i) In the Modern Periodic Table, Group 1 elements are alkali metals. | (i) In the Modern Periodic Table, Group 2 elements are alkaline earth metals. |
| (ii) Atoms of these elements have one electron in the valence shell. | (ii) Atoms of these elements have two electrons in their valence shell. |
| (iii) They are monovalent. | (iii) They are divalent. |
| (iv) Their oxides and hydroxides dissolve readily in water. | (iv) Their oxides and hydroxides dissolve slightly in water. |
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