Chemistry
Use Mendeleev's Periodic Table to predict the formula of:
(a) hydrides of carbon and silicon
(b) oxides of potassium, aluminium and barium.
Answer
(a) Carbon is in group 4. Hydride of any element of group 4 is written as RH4. Hence, the hydride of carbon will have the formula CH4.
Silicon is also in Group 4. So, the hydride will be SiH4.
(b) K is in Group 1 and have general oxide formula R2O. So, the oxide will be K2O.
Al is in Group 3 and have general oxide formula R2O3. So, the oxide will be Al2O3.
Ba is in Group 2 and have general oxide formula RO. So, the oxide will be BaO.
Related Questions
(a) What was Mendeleev's basis for classification of elements?
(b) Mendeleev's contributions to the concept of a periodic table laid the foundation for the Modern Periodic Table. Give reasons.
State Mendeleev's periodic law.
Which group of elements was missing from Mendeleev's original periodic table ?
State the merits of Mendeleev's classification of elements.