Chromatography + Easy 3rd Form

Question 1

What is the equation for calculating the RF value?

Answer 1

Distance traveled by solute / distance traveled by solution

Question 2

What is meant by RF value?

Answer 2

The ratio of distance moved by a compound to the distance moved by the solvent

Question 3

What is relative atomic mass? And how is it calculated?

Answer 3

The average mass of an element

(Number x percentage) + (number x percentage)

Question 4

What is a solution?

Answer 4

The mixture of the solute and solvent

Question 5

What mixture would be separated using simple distillation?

Answer 5

Salt and water

Question 6

What did James Chadwick prove?

Answer 6

The existence of neutrons within the nucleus

Question 7

What is an isotope?

Answer 7

Atoms of the same element with different numbers of neutrons

Question 8

Why do element in the some groups in the periodic table have similar properties?

Answer 8

Have same number of outer electrons in their outer shells