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Chemistry Unit 3 Review: Matter and the Atom
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Physical Change: Changes of state are always [blank]
Precipitate: Evidence of chemical change where a reaction produces a solid
Bubbles: Evidence of chemical change where a reaction produces a gas
Reactants: The initial substances for a chemical reaction
Products:The substances produced during a chemical reaction
Heat:Evidence of chemical change where a change in temperature occurs
Pure Substance: Matter made of only one type of substance
Mixture: Matter composed of 2 or more pure substances
Heterogeneous Mixture: A mixture with varying composition
Homogeneous Mixture: A mixture with the same composition throughout
Element: The simplest type of pure substance
Compound: Two or more elements that are chemically bonded
Chemical Change: The type of change needed to break compounds into elements (Example: Water to hydrogen and oxygen)
Dalton: Developed a theory suggesting that atoms of the same element are identical, all elements are composed of atoms, atoms of different elements can be physically or chemically mixed, and chemical reactions occure when atoms are joined, separated, or rearranged
Thompson: Developed the Plum Pudding Model of the atom
Rutherford: Discovered that atoms have nuclei that contain most of the mass of the atom with the gold foil experiment
Atomic Number: Number of protons in an element; number above the element symbol on the periodic table
Mass Number: Number of protons plus neutrons in an atom
Average Atomic Mass: Determined by percent abundances and atomic mass of isotopes
Proton: Positively charged subatomic particle with mass found in the nucleus of an atom
Neutron: Neutral subatomic partical with mass found in the nucleus of an atom
Electron: Negatively charged subatomic particle with relatively no mass found outside of the nucleus
Isotopes: Elements with different number of neutrons
Cation: Positively charged ions
Anion: Negatively charged ions
Chloride: Name for the anion of chlorine
Period: Horizontal ro on the periodic table
Group: Vertical column on the periodic table
Alkali Metals: H, Li, Na, K, Rb, Cs, Fr (Group 1A)
Alkaline Earth Metals: Be, Mg, Ca, Sr, Ba, Ra (Group 2A)
Halogens: F, Cl, Br, I, At (Group 7A)
Noble Gases: He, Ne, Ar, Kr, Xe (Group 8A)
Transition Metals: Group in the middle of the periodic table (1B-8B)
Chemistry Unit 3 Review: Matter and the Atom
Across:1. | Evidence of chemical change where a reaction produces a solid | 4. | Discovered that atoms have nuclei that contain most of the mass of the atom with the gold foil experiment | 6. | Changes of state are always [blank] | 8. | Evidence of chemical change where a reaction produces a gas | 9. | Matter composed of 2 or more pure substances | 10. | The type of change needed to break compounds into elements (Example: Water to hydrogen and oxygen) | 15. | Positively charged subatomic particle with mass found in the nucleus of an atom | 18. | Name for the anion of chlorine | 20. | Elements with different number of neutrons |
| 22. | Negatively charged subatomic particle with relatively no mass found outside of the nucleus | 23. | Positively charged ions | 24. | Number of protons plus neutrons in an atom | 25. | Horizontal ro on the periodic table | 27. | H, Li, Na, K, Rb, Cs, Fr (Group 1A) | 28. | A mixture with the same composition throughout | 29. | Negatively charged ions | 30. | Number of protons in an element; number above the element symbol on the periodic table | 31. | Be, Mg, Ca, Sr, Ba, Ra (Group 2A) |
| | Down:2. | Developed the Plum Pudding Model of the atom | 3. | The substances produced during a chemical reaction | 5. | Matter made of only one type of substance | 7. | Two or more elements that are chemically bonded | 11. | F, Cl, Br, I, At (Group 7A) | 12. | A mixture with varying composition | 13. | He, Ne, Ar, Kr, Xe (Group 8A) |
| 14. | Vertical column on the periodic table | 16. | Neutral subatomic partical with mass found in the nucleus of an atom | 17. | The simplest type of pure substance | 19. | The initial substances for a chemical reaction | 21. | Evidence of chemical change where a change in temperature occurs | 26. | Developed a theory suggesting that atoms of the same element are identical, all elements are composed of atoms, atoms of different elements can be physically or chemically mixed, and chemical reactions occure when atoms are joined, separated, or rearranged |
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© 2013
PuzzleFast.com, Noncommercial Use Only
Chemistry Unit 3 Review: Matter and the Atom
Across:1. | Evidence of chemical change where a reaction produces a solid | 4. | Discovered that atoms have nuclei that contain most of the mass of the atom with the gold foil experiment | 6. | Changes of state are always [blank] | 8. | Evidence of chemical change where a reaction produces a gas | 9. | Matter composed of 2 or more pure substances | 10. | The type of change needed to break compounds into elements (Example: Water to hydrogen and oxygen) | 15. | Positively charged subatomic particle with mass found in the nucleus of an atom | 18. | Name for the anion of chlorine | 20. | Elements with different number of neutrons |
| 22. | Negatively charged subatomic particle with relatively no mass found outside of the nucleus | 23. | Positively charged ions | 24. | Number of protons plus neutrons in an atom | 25. | Horizontal ro on the periodic table | 27. | H, Li, Na, K, Rb, Cs, Fr (Group 1A) | 28. | A mixture with the same composition throughout | 29. | Negatively charged ions | 30. | Number of protons in an element; number above the element symbol on the periodic table | 31. | Be, Mg, Ca, Sr, Ba, Ra (Group 2A) |
| | Down:2. | Developed the Plum Pudding Model of the atom | 3. | The substances produced during a chemical reaction | 5. | Matter made of only one type of substance | 7. | Two or more elements that are chemically bonded | 11. | F, Cl, Br, I, At (Group 7A) | 12. | A mixture with varying composition | 13. | He, Ne, Ar, Kr, Xe (Group 8A) |
| 14. | Vertical column on the periodic table | 16. | Neutral subatomic partical with mass found in the nucleus of an atom | 17. | The simplest type of pure substance | 19. | The initial substances for a chemical reaction | 21. | Evidence of chemical change where a change in temperature occurs | 26. | Developed a theory suggesting that atoms of the same element are identical, all elements are composed of atoms, atoms of different elements can be physically or chemically mixed, and chemical reactions occure when atoms are joined, separated, or rearranged |
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© 2013
PuzzleFast.com, Noncommercial Use Only