Chemistry Crossword

3. The SI unit of frequency equal to one cycle per second.
7. The arrangement of electrons around the nucleus of an atom in its ground state.
10. A dumbbell region around the nucleus where and electron may be found.
12. The modern description, primarily mathematical, of the behavior of electrons in atoms.
13. The lowest energy level occupied in the periodic table.
14. Displayed an atom with the majority of the mass in the nucleus.
15. The pattern of frequencies obtained by passing light emitted by the atoms of an element in the gaseous state through a prism.
17. Describes the wavelength of a moving particle.
19. electrons are ejected by certain metals where they absorb light with a frequency above a threshold frequency.
22. Electrons enter orbitals of lowest energy first.
23. no more than two electrons can occupy an atomic orbital.

1. A number used to calculated the radiant energy absorbed or emitted by a body based on the frequency of radiation.
2. Displayed the atom as a ball of positive charge with a few electrons.
4. A spherical region around the nucleus where an electron may be found. The inner most sphere is one of these.
5. States that it is impossible to know both the velocity and the position of a particle at the same time.
6. Proposition that electrons travel in definite orbits around the nucleus.
8. When electrons occupy orbitals of equal energy.
9. A region around the nucleus of an atom where an electron is likely to be moving.
11. a region in space around the nucleus of an atom where there is a high probability of finding an electron.
16. A nucleus that has a higher energy level than a ground level.
18. The amount of energy needed to move an electron from its present energy level to the next higher one.
20. The number of wave cycles that pass a given point per unit of time.
21. The distance between two adjacent crests of a wave.
24. The height of a wave from the origin to the crest.
25. A quantum of light; a discrete bundle of electromagnetic energy that behaves as a particle.