My Chemical World Part 2

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Across
  1. 3. a metal that is liquid at room temperature
  2. 4. group ________ are the halogens
  3. 6. what is being reacted together in a chemical reaction to produce products
  4. 8. atoms are __________ as the number of positive protons and number of negative electrons are equal
  5. 10. positively charged particle, atomic number is based on the number of these
  6. 11. the first electron shell can hold up to ____ electrons
  7. 12. compounds made up of 2 elements end in _____
  8. 13. a COLUMN in the Periodic Table is referred to a _________
  9. 15. Group 0/8 are called the _________ gases
  10. 16. fizzes across water's surface, bursts into a lilac flame
  11. 18. fizzing/effervescence is evidence a chemical reaction has happened because it signs that a _______ is given off
  12. 20. a ROW in the Periodic Table is referred to a _________
  13. 21. element needed in compounds made up of 3 elements ending in -ate or -ite
  14. 23. simple substances that cannot be broken down further, made up of only one type of atom
  15. 24. every electron shell that is not the first electron shell can hold up to _____ electrons
Down
  1. 1. atomic number 33 (chemical symbol: As)
  2. 2. When a solid is produced in a chemical reaction, it is known as a _______________ reaction
  3. 5. negatively charged particles that sit within shells around the nucleus
  4. 7. the middle section of the Periodic Table are called __________ metals
  5. 9. heat energy released (temperature rise) from a chemical reaction is called an ____________ reaction . ​
  6. 10. a _______ is the result of having combined reactants
  7. 14. Group 1 is the ________ metals
  8. 17. dividing the Periodic Table into metals and non-metals
  9. 19. a Group 7 halogen that us used in toothpaste
  10. 22. a Group 0/8 element used for display signs