Crossword Puzzle Chemistry

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  1. 4. The scientist who developed the concept of the Atomic Number.
  2. 7. An atom’s _________ is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus.
  3. 8. It is a species of atoms that have a given number of protons in their nuclei, including the pure substance consisting only of that species.
  4. 12. The tendency of main group elements atom to form chemical bonds in a way that each atom obtains eight valence electrons is described by the _______
  5. 14. It is a chemical substance composed of many identical molecules containing atoms from more than one chemical element held together by chemical bonds.
  6. 15. The scientist who first discovered phosphorus
  7. 17. The atomic number of a specific chemical element indicates the number of ________ in the nucleus of an atom of the chemical element.
  8. 19. Metals are chemicals that are solid, shiny, ductile, malleable, and good conductors of heat and _____
  9. 20. The scientist who classified several elements into sets of three called Triad.
Down
  1. 1. Russian chemist who formulated the Periodic Law as well as created a version of the periodic table of elements.
  2. 2. chemicals that lack the characteristic of metallic properties and thus appear dull and are poor conductors of heat and electricity.
  3. 3. What group of elements has a full octet of electrons?
  4. 5. possess both properties of metals and non-metals which means they can conduct heat and electricity moderately well but not as good as metal.
  5. 6. is the minimum amount of energy required to remove the most loosely bound electron, the valence electron, of an isolated neutral gaseous atom or molecule.
  6. 9. Atoms are composed of ___________ particles.
  7. 10. An _______ is the smallest particle of an element.
  8. 11. The ______ shell is the outermost layer of an atom.
  9. 13. What element does Au stands for?
  10. 16. Protons and Neutrons make up the _______
  11. 18. chemical elements are arranged in groups and periods according to their atomic number, electron configuration, and their chemical properties.