atomic structure

What is the charge of an electron?

• +2

• +1

• 0

• -1

What process is used to separate a soluble salt from a solution quickly?

• Distillation

• Filtration

• Crystallisation

• Evaporation

What do atoms contain in their nucleus?

• Neutrons and electrons

• Protons and neutrons

• Electrons and protons

• Only protons

What is the relative atomic mass equation?

• number of protons × number of neutrons

• sum of protons + sum of neutrons

• number of electrons / number of protons

• sum of (isotope abundance × isotope mass number) / sum of abundances of all isotopes

What are isotopes?

• Atoms with different numbers of protons and electrons

• Atoms with the same number of protons but different electrons

• Atoms with the same number of electrons but different protons

• Atoms with the same number of protons but different neutrons

What did Dimitri Mendeleev use to organize the periodic table?

• Number of neutrons

• Number of electrons

• Atomic mass

• Atomic number

What characteristic changes as you go down the group of alkali metals?

• They become less reactive

• They lose electrons more slowly

• They become less dense

• They become more reactive

What is the maximum number of electrons in the second shell of an atom?

• 8

• 2

• 18

• 32

What is the result of the reaction between lithium and water?

• Lithium hydroxide + hydrogen

• Lithium oxide + water

• Lithium chloride + hydrogen

• Lithium + hydrochloric acid

Which scientist discovered the neutron?

• John Dalton

• JJ Thomson

• Ernest Rutherford

• James Chadwick