Intro to Chemistry Ch3 - Periodic Table

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Across
  1. 1. – the row in a periodic table
  2. 3. – a mixture of metals
  3. 5. – electrons that are lost, gained, or shared in a chemical reaction
  4. 8. – can be pounded into shape
  5. 12. – average mass of all the isotopes of one atom of an element
  6. 13. – when the atom loses 2 protons and 2 neutrons
  7. 14. – able to be pulled or drawn into a wire
  8. 15. – core of an atom
  9. 16. – can transmit heat and electricity easily
Down
  1. 2. – a nuclear reaction where the atomic nuclei release fast-moving particles and energy
  2. 3. – the number of protons in its nucleus
  3. 4. – elements that are malleable, ductile, and conductive
  4. 6. – molecules of 2 identical atoms
  5. 7. – when a neutron changes into a fast-moving electron and a proton
  6. 9. – the column in a periodic table
  7. 10. – atoms with the same number of protons but different numbers of neutrons
  8. 11. – a gigantic explosion that breaks apart a massive star