Which is a good metal?
Correct answer: C. Mg (Magnesium)
- A. Na (Sodium)
- B. K (Potassium)
- C. Mg (Magnesium)
- D. Ca (Calcium)
Explanation
Magnesium (Mg) is considered a 'good' metal because it is lightweight, strong, and ductile, making it suitable for various industrial applications. It has good thermal and electrical conductivity, which are desirable properties for a metal.Sodium (Na) and Potassium (K) are alkali metals, which are too reactive and soft for most structural purposes. Calcium (Ca), while having some useful properties, is not as strong or versatile as magnesium and is often used in compound form rather than as a pure metal.
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About Reactions of Group II Elements
Group II reactions cover the behaviour of beryllium, magnesium, calcium, strontium and barium with water, oxygen, halogens, acids and nitrogen. The trends in reactivity, hydroxide solubility and basicity, along with the thermal decomposition of carbonates and nitrates, depend on increasing atomic size down the group.
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