Why couldn't Mendeleev organize the entire periodic table durning his rea search

This is how krypton appears in the periodic table. A purple box has K r at the center and 36 above. Below it says krypton and below that 83.80. Rounded to the nearest whole number, how many protons are in an atom of krypton? 36 48 84 120

How to tell if a base exists in water

A beaker with 1.80*102 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 5.10 mL of a 0.440 M HCl solution to the beaker.

How are reactants converted to products in an elementary reaction?

The equation for the metabolic breakdown of glucose (C6H12O6) is the same as the equation for the combustion of glucose in air: C6H12O6 (s) + 6O2 (g) → 6CO2 (g) + 6H2O (l) Calculate the volume of CO2 produced at 37°C and 1.00 atm when 3.

Which is the noble gas notation for chlorine? A-[Ne] 4s2 4p5 B-[Ne] 3s2 3p5 C-[Ne] 3s2 3p3 D-[Ne] 3p2 3p5

Is argon long hand or noble gas

Lithium, beryllium, and boron are elements with atomic number 3, 4, and 5, respectively. Even though they are three of the five simplest elements, why are they rare compared to many heavier elements?

What is the formula equation for: Copper (II) Sulfate Pentahydrate - > Copper (II) Sulfate + Water?

what combination will result in a acidic solution? a reaction of strong acid and strong base b reaction of strong acid and weak base c a reaction of weak acid and strong base d reaction of weak acid and weak base