Chemistry Lab Manual®

2. Why did Mendeleev leave blank spaces on his periodic table? 3. What is the reason (unknown to Mendeleev) that elements in the same group have similar properties? 4. Why is it necessary to rinse the stirring rod between test tubes? MATERIALS: 3 test tubes labeled A, B, C Test tube rack 10-mL graduate cylinder Stirring rod. Unknown solutions 1-9 ................
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