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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:3. | Changes of state are always [blank] | 4. | 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 | 5. | Developed the Plum Pudding Model of the atom | 8. | Matter composed of 2 or more pure substances | 9. | Negatively charged ions | 11. | Horizontal ro on the periodic table | 14. | A mixture with varying composition | 17. | The initial substances for a chemical reaction |
| 19. | Two or more elements that are chemically bonded | 20. | Elements with different number of neutrons | 22. | The simplest type of pure substance | 25. | Discovered that atoms have nuclei that contain most of the mass of the atom with the gold foil experiment | 26. | Number of protons in an element; number above the element symbol on the periodic table | 27. | Be, Mg, Ca, Sr, Ba, Ra (Group 2A) | 28. | The type of change needed to break compounds into elements (Example: Water to hydrogen and oxygen) |
| | Down:1. | Name for the anion of chlorine | 2. | Neutral subatomic partical with mass found in the nucleus of an atom | 3. | Positively charged subatomic particle with mass found in the nucleus of an atom | 5. | Group in the middle of the periodic table (1B-8B) | 6. | Evidence of chemical change where a reaction produces a gas | 7. | Positively charged ions | 10. | F, Cl, Br, I, At (Group 7A) | 12. | Evidence of chemical change where a change in temperature occurs |
| 13. | Evidence of chemical change where a reaction produces a solid | 15. | Number of protons plus neutrons in an atom | 16. | A mixture with the same composition throughout | 18. | Negatively charged subatomic particle with relatively no mass found outside of the nucleus | 21. | The substances produced during a chemical reaction | 23. | He, Ne, Ar, Kr, Xe (Group 8A) | 24. | Vertical column on the periodic table |
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© 2013
PuzzleFast.com, Noncommercial Use Only
Chemistry Unit 3 Review: Matter and the Atom
Across:3. | Changes of state are always [blank] | 4. | 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 | 5. | Developed the Plum Pudding Model of the atom | 8. | Matter composed of 2 or more pure substances | 9. | Negatively charged ions | 11. | Horizontal ro on the periodic table | 14. | A mixture with varying composition | 17. | The initial substances for a chemical reaction |
| 19. | Two or more elements that are chemically bonded | 20. | Elements with different number of neutrons | 22. | The simplest type of pure substance | 25. | Discovered that atoms have nuclei that contain most of the mass of the atom with the gold foil experiment | 26. | Number of protons in an element; number above the element symbol on the periodic table | 27. | Be, Mg, Ca, Sr, Ba, Ra (Group 2A) | 28. | The type of change needed to break compounds into elements (Example: Water to hydrogen and oxygen) |
| | Down:1. | Name for the anion of chlorine | 2. | Neutral subatomic partical with mass found in the nucleus of an atom | 3. | Positively charged subatomic particle with mass found in the nucleus of an atom | 5. | Group in the middle of the periodic table (1B-8B) | 6. | Evidence of chemical change where a reaction produces a gas | 7. | Positively charged ions | 10. | F, Cl, Br, I, At (Group 7A) | 12. | Evidence of chemical change where a change in temperature occurs |
| 13. | Evidence of chemical change where a reaction produces a solid | 15. | Number of protons plus neutrons in an atom | 16. | A mixture with the same composition throughout | 18. | Negatively charged subatomic particle with relatively no mass found outside of the nucleus | 21. | The substances produced during a chemical reaction | 23. | He, Ne, Ar, Kr, Xe (Group 8A) | 24. | Vertical column on the periodic table |
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© 2013
PuzzleFast.com, Noncommercial Use Only