NS ePrep Course – Life Science

Crossword Puzzle

Life’s Chemical Basis
Crossword Puzzle on Life's chemical basis in NS Life Science ePrep course

ACROSS
2. atom or molecule that carries a net charge.
3. central core of an atom.
7. a dissolved substance.
9. liquid that can dissolve other substances.
11. transition of a liquid to a vapor.
13. describes a substance that dissolves easily in water.
18. forms of an element that differ in the number of neutrons their atoms carry.
21. negatively charged subatomic particle.
22. measure of the ability of an atom to pull electrons away from other atoms.
24. molecule that has atoms of more than one element.
25. a molecule with a detectable component.

DOWN
1. positively charged subatomic particle that occurs in the nucleus of all atoms.
4. uniform mixture of solute completely dissolved in solvent.
5. substance that accepts hydrogen ions in water.
6. compound that releases ions other than H+ and OH– when it dissolves in water.
8. uncharged subatomic particle that occurs in the atomic nucleus.
10. isotope with an unstable nucleus.
12. describes a substance that resists dissolving in water.
14. amount of solute per unit volume of solution.
15. property of a substance that arises from the tendency of its molecules to resist separating from one another.
16. any separation of charge into positive and negative regions.
17. A pure substance that consists only of atoms with the same number of protons.
19. substance that releases hydrogen ions in water.
20. measure of molecular motion.
23. set of chemicals that can keep the pH of a solution stable by alternately donating and accepting ions that contribute to pH.

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