Choose the correct answer: In the periodic table alkali metals are placed in group - A:1, B:11, C:17, D:18 Which of the following properties: do not match with elements of the halogen family, A : They have seven electrons in their valence shell, B : They are highly reactive chemically, C: They are metallic in nature, D: They are diatomic in their molecular form.
Choose the correct answer: In the periodic table alkali metals are placed in group - A:1, B:11, C:17, D:18 Which of the following properties: do not match with elements of the halogen family, A : They have seven electrons in their valence shell, B : They are highly reactive chemically, C: They are metallic in nature, D: They are diatomic in their molecular form.