Unit 3 Blue Frosting

12345678910111213141516171819
Across
  1. 2. The time it takes for the radiation or activity in an element to decrease to half its original value
  2. 4. A group of elements that have similar properties
  3. 9. The combining of nuclei to form a bigger and heavier nucleus
  4. 10. A particles found in the nucleus of an atom that has a positive charge
  5. 11. Patterns in the properties of chemical elements through a period such as electonegativity
  6. 13. States that lower electron orbital must be filled before electrons can be added to higher orbitals
  7. 15. States that lower electron orbital must be filled before electrons can be added to higher orbitals
  8. 17. The name given to a horizontal row of the periodic table
  9. 18. A column of elements in the periodic table
  10. 19. A type of particle that is given of during radiation as a Helium element
Down
  1. 1. Type of radiation in which unstable atomic nuclei spontaneously give off extra energy
  2. 3. The measure of the tendency of an atom to attract a bonding pair of electrons
  3. 4. A particle with a negative charge that is found around the nucleus
  4. 5. States that an orbital can contain a maximum of two electrons
  5. 6. Two or more forms of the same element that have equal numbers of protons but different numbers of neutrons
  6. 7. The splitting of a heavy nucleus into lighter nuclei
  7. 8. Every orbital in a subshell is occupied with one electron before an orbital is doubly occupied
  8. 12. Decay in which a neutron in an atom's nucleus turns into a proton and an electron is given off as radiation
  9. 14. The distance between crests of a wave
  10. 16. The net positive or negative charge of an element or molecule due to the loss or gain of a valence electron