Pathway 4: Chapter 4 Vocabulary
Fill the blanks with word or the words that best fit the description
Reference Chapter 4 Page 123-124.

1._____________________ The total mass of an atom. The atomic mass of each element presented in the periodic table is the average atomic mass of the various isotopes of that element occurring in nature.

2. _____________________The dense, positively charged center of every atom.

3. _____________________The number of protons in the atomic nucleus of each atom of a given element.

4. _____________________The pattern of frequencies of electromagnetic radiation emitted by the atoms of an element, considered to be an element’s “fingerprint.”

5. _____________________A representation of a system that helps us predict how the system behaves.

6. _____________________The nuclear charge experienced by outer-shell electrons, diminished by the shielding effect of inner-shell electrons and also by the distance from the nucleus.

7. _____________________The complete range of waves, from radio waves to gamma rays.

8. _____________________ An extremely small, negatively charged subatomic particle found outside the atomic nucleus.

9. _____________________The arrangement of an atom’s electrons within orbitals.

10. _____________________A schematic drawing used to arrange atomic orbitals in order of increasing energy levels.

11. _____________________The tendency of inner-shell electrons to partially shield outer-shell electrons from the attractive pull exerted by the positively charged nucleus.

12. _____________________The amount of energy needed to pull an electron away from an atom.

13. _____________________ Any member of a set of atoms of the same element whose nuclei contain the same number of protons but different numbers of neutrons.

14. _____________________The number of nucleons (protons plus neutrons) in the atomic nucleus. Used primarily to identify isotopes.

15. _____________________ An electrically neutral subatomic particle found in atomic nuclei.

16. _____________________ Any subatomic particle found in an atomic nucleus. Another name for either proton or neutron.

17. _____________________A representation of an object on some convenient scale.

18. _____________________ A positively charged subatomic particle in atomic nuclei.

19. _____________________ A small, discrete packet of energy.

20. _____________________An integer that specifies the quantized energy level within an atom.

21. _____________________ A graphic representation of a collection of orbitals of comparable energy in a multielectron atom. A shell can also be viewed as a region of space about the atomic nucleus within which electrons may reside.

22. _____________________ A device that uses a prism or diffraction grating to separate light into its color components and measure their frequencies.