The element rubidium is located in group one, while stratum is located in group 2. Which ions are commonly formed by each

Option B. Rb⁺ and Sr²⁺

Explanation:

From the question given above,

Rubidium (Rb) is located in group 1 Strontium (Sr) is located in group 2.

Group 1 element can only form ion by losing 1 electron. Thus, Rubidium (Rb) can form ion by losing it outmost electron (i.e 1) according to the equation below:

Rb —> Rb⁺ + e¯

Thus, Rubidium form ion as Rb⁺

Group 2 element can form ion by losing 2 electrons. Thus, Strontium (Sr) can form ion by losing it outmost electron(s) (i.e 2) according to the equation below:

Sr —> Sr²⁺ + 2e¯

Thus, Strontium form ion as Sr²⁺

SUMMARY:

Rubidium form ion as Rb⁺

Strontium form ion as Sr²⁺

Therefore, option B gives the correct answer to the question.

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