5 Written questions
5 Matching questions
- Ionic Bond
- Radioactive Isotope
- Evaporative Cooling
- a A substance that is dissolved in a solution.
- b An isotope whose nucleus decays spontaneously, giving off particles and energy.
- c occurs because the molecules with the greates energy leave.
- d An atom or group of atoms that has gained or lost one or more electrongs, thus acquiring a charge.
- e A chemical bond resulting from the attraction between oppositely charged ions.
5 Multiple choice questions
- A type of weak chemical bond formed when the partially positive hydrogen atom participating in a polar covalent bond in one molecule is attracted to the partially negative atom participating in a polar covalent bond in another molecule (or in another region of the same molecule).
- The total mass of an atom; also called atomic weight. Given as a whole number, the atomic mass approximately equals the mass number.
- An energy level representing the distance of an electron from the nucleus of an atom.
- Oxygen, carbon, hydrogen, and nitrogen.
- Neutrons and protons.
5 True/False questions
Neutron → A subatomic particle with a single negative electrical charge. One or more electrons move around the nuclues of an atom.
Trace elements → an element that is essential for life but required in extremely minute amounts.
Second shell of an atom can contain how many electrons? → 8
Cohesion → The attraction between different kinds of molecules.
First shell of an atom can contain how many electrons? → 18