Chemistry
Answer
Na
Reason — Aluminium (Al), Sulphur (S), Magnesium (Mg) and Sodium (Na) belong to third period. Atomic size decreases on moving across the period as new electrons are added to the same shell. Sodium is the first member of period 3, hence sodium has the largest atomic radius of the given elements.
Related Questions
Identify from the following metal oxide which can react with an acid as well as an alkali.
- Silver oxide
- Calcium oxide
- Copper(II) oxide
- Aluminium oxide
The structures of four hydrocarbons are shown below:
How many isomers of butene are there?
- 1
- 2
- 3
- 4
For which pH change is there the maximum increase in acidity?
Initial pH Final pH 1. 1 3 2. 2 6 3. 3 1 4. 6 2 The equation below shows the reaction between element 'X' and dilute sulphuric acid.
X(s) + H2SO4 (aq.) ⟶ XSO4 (aq.) + H2 (g)
Which particles are responsible for conducting electricity in dilute sulphuric acid and compound XSO4?
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- Only positive ions
- Only negative ions
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