Question

1. Which element in each pair is more reactive: i) O or S ii) Be or Ca iii) Na or Mg iv) Li or Rb

Answer 1

Answer:

(iv)

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

i) $\huge\bold\red{Answer~:-}$

• Oxygen ✔

$\huge\underline{Reason~:-}$

→ Due to small atomic size of sulfur .

ii) $\huge\bold\red{Answer~:-}$

• Calcium ✔

$\huge\underline{Reason~:-}$

→ Valence electrons of calcium are further away from the nucleus when compares with Beryllium.

iii) $\huge\bold\red{Answer~:-}$

• Sodium ✔

$\huge\underline{Reason~:-}$

→ This metals are less reactive when compared with neighbouring elemants like as

• Magnesium is less active than Sodium,
• Calcium is less active than Potassium and
• so on.

iv) $\huge\bold\red{Answer~:-}$

• Rubidium ✔