5 Written questions
4 Multiple choice questions
- a subatomic particle that is found in the nuclei of atoms, bears a unit of positive charge, and has a relatively large mass, roughly equal to the mass of the neutron.
- the property of a liquid to resist penetration by objects at its interface with the air, due to cohesion between molecules of the liquid.
- a particle composed of one or more atoms held together by chemical bonds; the smallest particle of a compound that displays all the properties of that compound.
- a chemical bond formed by the electrical attraction between positively and negatively charged ions.
4 True/False questions
electron shell → a subatomic particle that is found in the nuclei of atoms, bears no charge, and has a mass approximately equal to that of a proton.
non-polar covalent bond → a covalent bond with unequal sharing of electrons, such that one atom is relatively negative and the other is relatively positive.
pH scale → a scale, with values from 0 to 14, used for measuring the relative acidity of a solution; at pH 7 a solution is neutral, pH 0 to 7 is acidic, and pH 7 to 14 is basic; each unit on the scale represents a tenfold change in concentration.
solvent → a liquid capable of dissolving (uniformly dispersing) other substances in itself.