26. Why did Mendeleev leave spaces in his periodic

table?

I need some new friends lol

Which is the paramagnetic oxide of chlorine

How to refer to periodic table in order to predict the number of valence electrons?

What nuclide would be produced from the positron emission of Co-56?

We see an object as black when all of the wavelengths in the visible spectrum are being?

Which usually has a higher temperature? A city or the areas around the city?

Toluene and pyridine form ideal solutions. Consider a solution of toluene and pyridine prepared at 25°C. Assuming that the mole fractions of toluene and pyridine in the vapor phase are equal, calculate the composition of the solution.

Formula for water what does the lack of a subscript after those O indicate

Why do the chemical properties cycle through each period? Every eighth element starting with hydrogen restarts the transition from metal to inert gas. Elements with atomic numbers which are multiples of eight start a new period.

Which statement correctly describes the Ka of a weak acid? The Ka is large, and the equilibrium favors products. The Ka is large, and the equilibrium favors reactants. The Ka is small, and the equilibrium favors products.