How Do You Know? The Periodic Table Tells You So!

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Across
  1. 5. Niels Bohr was a famous Danish scientist, and this synthetic element was named after him
  2. 7. STP stands for Standard ____ and Pressure
  3. 10. Highly reactive Group 1 metals are known by this adjective
  4. 12. The 1-3 letter abbreviation for an element on the periodic table is know as that element's chemical ____.
  5. 14. Compounds containing the element with an atomic number of ___ are often found in toothpastes and mouthwash, as well as some drinking water (this is a good thing!)
  6. 15. The name for the rows (horizontal) on the Periodic Table of Elements
  7. 16. This alkaline earth metal is an extremely important mineral for you as a human, given its helps to promote healthy teeth and bones!
  8. 17. The chemical symbol for this element is derived from the Latin word "ferrum"
  9. 20. Families or ____ of elements run vertically on the periodic table
  10. 21. These sub-atomic particles, which orbit the nucleus of an atom, are so tiny that they don't really contribute to the overall mass of an atom
  11. 24. This is term for an atom of a specific element that has the same number of protons as a typical atom of the element but a different number of neutrons; hence, the average of the masses of these give us the atomic mass of element
  12. 25. In general, metallic elements are found on the ___ side and in the middle of the periodic table, while nonmetals tend to be found on the right
Down
  1. 1. It is very rare to find an element in this state of matter at STP
  2. 2. Electrons have this type of electrical charge
  3. 3. This adjective describes the group of gases that are extremely stable and rarely react with any other elements
  4. 4. The compound, NaCl, is simply common table salt, and it is made of chlorine and ___ bonded together
  5. 6. This group (hint...it's group number is a prime number) contains elements that are often used to sanitize swimming pools
  6. 8. If you add the mass of the protons and neutrons of an atom of an element together, the sum will be equal to that element's ____ (hint...two words)
  7. 9. At STP, temperature is equal to ___ degrees Celsius
  8. 11. All of the actinides are ____, which makes them hazardous to your health. You don't want to play around with them if ever given the chance!
  9. 13. The sub-atomic particle that has just about the same mass as a proton.
  10. 14. Protons and neutrons are found in the ____ of an atom, while electrons are found orbiting it
  11. 18. An elements atomic number is the same as the number of ____ an atom of that specific element has in its nucleus
  12. 19. As you move across a period on the periodic table, the number of ____ found in each element increases, which is why the atomic number of each consecutive element increases across a period
  13. 22. These metals are what we think of when we envision a typical metal. They have high melting points and are often found in fireworks because they produce lovely colors when they react/are heated
  14. 23. At STP, niobium exists in this state (of matter)