Oquizy

An atom of fluorine has atomic number 9 and mass number 19. What are the subatomic particles in F⁻?

10p, 10n, 9e 9p, 10n, 10e 9p, 10n, 8e 9p, 9n, 10e

What does the atomic number of an atom represent?

Number of electrons Number of neutrons Number of nucleons Number of protons

What is the number of neutrons in ³⁷₁₇Cl?

17 20 37 54

Which gas diffuses the fastest at room temperature?

Ammonia Carbon dioxide Chlorine Oxygen

Which statement explains why solids have a fixed shape?

Their particles are chemically bonded Their particles are far apart Their particles can only vibrate in fixed positions Their particles move freely in all directions

Xinyi is doing an experiment. A cotton wool soaked in concentrated hydrochloric acid is placed at one end of a glass tube and another soaked in ammonia at the other. A white ring forms closer to the HCl end. Why?

Ammonia particles are heavier Ammonia particles diffuse faster due to lower mass Hydrochloric acid particles move faster They react immediately upon release

Quiz: Chemistry - The Particulate Nature Of Matter