Which of the following pairs has both members from the same period of the periodic table?Only one correct answerA.Na−CaNa−CaB.Na−ClNa−ClC.Ca−ClCa−ClD.Cl−BrCl−Br
Question
Which of the following pairs has both members from the same period of the periodic table?Only one correct answerA.Na−CaNa−CaB.Na−ClNa−ClC.Ca−ClCa−ClD.Cl−BrCl−Br
Solution
The correct answer is D. Cl−Br. Both Chlorine (Cl) and Bromine (Br) are from the same period of the periodic table, specifically Period 3.
Here's a step-by-step explanation:
- Look at the periodic table.
- Find the elements mentioned in the options.
- Check which period (horizontal row) each element is in.
- Compare the periods of the elements in each pair.
In option A, Sodium (Na) is in Period 3 and Calcium (Ca) is in Period 4. In option B, Sodium (Na) is in Period 3 and Chlorine (Cl) is in Period 3. In option C, Calcium (Ca) is in Period 4 and Chlorine (Cl) is in Period 3. In option D, Chlorine (Cl) and Bromine (Br) are both in Period 3.
Therefore, the pair that has both members from the same period of the periodic table is D. Cl−Br.
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