Crossword Puzzle on Atomic Structure

1. Atomic symbol for copper.
3. h = 6.626 × 10-34 Js
5. The mass number is the sum of the number of neutrons and protons.
7. f = 1/T (waves per second)
8. Atomic symbol for polonium.
10. Atomic symbol for sodium.
14. λ = v/f (measured in meters)
16. Minimum amount of energy that can be gained/lost by an atom.
17. Shortest wavelength and highest frequency.
20. Segment of the electromagnetic spectrum that the human eye can view.
21. The number of protons in the nucleus of an atom.
23. Atoms with the same number of protons but different numbers of neutrons.
24. Atom made up of an equal number of protons, neutrons, and electrons.
26. Atomic symbol for radium.
27. The basic units of matter.
31. Atoms with a "+" charge that have fewer elections than protons.
32. (of every atom) tiny object made entirely of protons and neutrons.
33. 3.00 x 10^8 m/s
34. An atom of helium (recall Rutherford experiment).
37. Unit of frequency.
39. An atom where the number of electrons is different from the number of protons.
40. Model of the atom proposed by JJ Thomson. According to this model, the atom is a sphere of positive charge, and negatively charged electrons are embedded in it to balance the total positive charge.
41. Range of wavelengths/frequencies extending from gamma rays to the longest radio waves and including visible light.
42. Negatively charged particles of an atom.

1. Observed when a substance heated in a flame varies from one substance to another.
2. Negatively charged particle, located in the outermost shell of an atom; can be transferred to/ shared with another atom.
4. Atomic number of chlorine.
6. What atoms are made up of.
9. Small-sized number on the bottom right of the symbol.
11. Atoms with a "-" charge that have more electrons than protons.
12. The distribution of electromagnetic radiation released by a substance whose atoms have been excited by heat or radiation (term abbreviated).
13. Sub-atomic particle with a zero charge.
15. Atomic symbol for gold.
18. Atomic number of calcium.
19. A tiny particle of light or electromagnetic radiation.
22. Unit for wavelength.
25. Dependent on the number of protons, neutrons, and electrons.
28. Occurs when the number of electrons in an atom doesn't equal the number of protons.
29. Innermost shell of electrons containing the lowest available energy level for the electrons.
30. Longest wavelength and lowest frequency.
35. A species of atoms that have a given number of protons in their nuclei.
36. Unit of energy.
38. Atomic number of zinc.
40. Sub-atomic particle with a positive charge.
43. Atomic number of mercury.