Question

(ii) Atomic number of metal “A” is 11, while atomic number of metal "B" is
20. Which of them will be more reactive? Write the chemical reaction of
dilute HCl with metal "A".​

Answer 1

$Reactivity: \\ The valence \\ shell of sodium \\ is half filled \\ whereas the valance \\ shell of calcium \\ is fully filled. \\ The electrons \\ readily fill the \\ half filled \\ shell. \\ Thus, the reactivity \\  of sodium is  \\ more than \\ the reactivity of \\ calcium.$

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Answer 2

Answer:

Atomic number of metal “A” is 11, while atomic number of metal "B" is

20. Which of them will be more reactive? Write the chemical reaction of

dilute HCl with metal "A".