Chemistry Paper 1 Revision

There periodic table contains all 118 of the known _____?

What does the formula H₂O tell us?

• Water molecules contains 1 hydrogen and 2 oxygen atoms

• Water atoms contains 2 hydrogen and 1 oxygen molecules

• Water molecules contains 2 hydrogen and 1 oxygen atoms

• Water atoms contain 1 hydrogen and 2 oxygen molecules

How can you separate a mixture of an insoluble solid and a liquid?

• Chromatography

• Crystallisation

• Distillation

• Filtration

How would you work out the R_f value for the purple spot?

• 6 / 8

• 8 / 6

• 3.4 + 4.2 + 6

• 8 - 6

Distillation is used to separate mixtures of liquids with different ________.

What did the Gold Foil experiment discover?

• That atoms are solid spheres

• That atoms contain neutrons

• That atoms contains both positive and negative charges

• That atoms are mostly empty space and have a tiny nucleus

Sketch a diagram of a helium nucleus

What is the relative mass of an electron?

• -1

• Negligible

• 0

• +1

What does the atomic number tell you?

• Number of protons

• Number of electrons

• Number of protons + number of neutrons

• Number of neutrons

How many electrons can fit in the 3rd electron shell

• 8

• 2

• 10

• -1