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All matter is made up of ATOMS.

All matter is made up of ATOMS. A. A – Electron. Identify each labeled structure in the atom. Describe the charge for each particle. Electrons have a negative charge. B. B – Neutron. Neutrons have no charge (neutral). C - Proton. Protons have a positive charge. C.

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All matter is made up of ATOMS.

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  1. All matter is made up of ATOMS.

  2. A A – Electron Identify each labeled structure in the atom. Describe the charge for each particle. Electrons have a negative charge. B B – Neutron Neutrons have no charge (neutral). C - Proton Protons have a positive charge. C

  3. Where are protons and neutrons found in an atom? 2. Where are electrons found in an atom? In the nucleus of an atom. Outside the nucleus of an atom.

  4. Which of the following is not an element? 1. oxygen 2. sodium chloride 3. hydrogen 4. nitrogen

  5. A positively charged particle is a PROTON.

  6. Which subatomic particle would be found outside the nucleus of an atom? ELECTRON

  7. A chemical formula like CO2 represents an element 2. an atom    an electron  4. a compound

  8. A substance made up of two or more elements that have been chemically combined is a COMPOUND.

  9. A substance made up of two or more elements that have been physcially combined is a MIXTURE.

  10. A substance that cannot be changed into simpler substances by a chemical change is called a (an) 1. element. 2. liquid. 3. solid. 4. mixture.

  11. In sweetened tea, the sugar is called the 1. solute. 2. solvent. 3. colloid. 4. solution.

  12. Which of the following would help sugar dissolve faster in water? stirring the water decreasing the solubility of sugar using larger particles of sugar decreasing the water temperature

  13. A soluble substance easily dissolves in a solvent. An insoluble substance DOES NOT dissolve in a solvent. Describe the difference between a soluble and insoluble substance.

  14. Sand and iron particles that are similar in size and color are mixed together in a beaker. What would be the best method of separating the particles? Use tweezers to separate them. Add water to the mixture. Use a magnet to separate them. Pour the mixture into a filter.

  15. The substances in a mixture can be separated by physical means because no chemical change occurs when the substances are combined. the physical and chemical properties of the substances change. none of the properties of the substances change. the chemical, but not the physical, properties of the substances change.

  16. Mass number 80 • # of protons 35 • # of electrons 35 • # neutrons 45

  17. Mass number 112 • # of protons 48 • # of electrons 48 • # neutrons 64

  18. Mass number • # of protons • # of electrons • # neutrons

  19. All samples of an element are composed of atoms with the same atomic mass atomic number number of protons and neutrons number of neutrons

  20. Elements at the left of the periodic table are known as METALS

  21. Elements at the right of the periodic table are known as NONMETALS

  22. They have the same (BUT NOT IDENTICAL) properties. The elements oxygen, sulfur, selenium and tellurium are all found in the same group (16) on the table. What do we know about the elements in that family?

  23. Family 18 Noble gases • In what family is neon found? • What do we call those elements in that group?

  24. Which element is a metalloid? 1. S (Sulfur) 2. Si (Silicon) 3. Ba (Barium) 4. Br (Bromine)

  25. Explain what occurs to the atomic number when moving from left to right on the periodic table. Atomic number increases.

  26. Which three elements have the most similar chemical properties? Ar, Kr, Br K, Rb, Cs B, C, N O, N, Si

  27. Which element is a noble gas? hydrogen oxygen neon nitrogen

  28. Identify the solid, liquid and gas! Support your answer. Liquid - Atoms are loosely packed Solid - Atoms are tightly packed Gas - Atoms are very loosely packed

  29. Identify the phase change described. 1. Solid to liquid: 2. Gas to liquid: 3. Liquid to solid: 4. Solid to gas: 5. Liquid to gas: melting condensation freezing sublimation vaporization

  30. For each phase change describe whether energy is RELEASED or ABSORBED. 1. Melting: 2. Freezing: 3. Vaporization: 4. Sublimation: 5. Condensation: ABSORBED RELEASED ABSORBED ABSORBED RELEASED

  31. The particles of a substance are closest together in a solid a liquid a gas plasma

  32. The particles of a substance move most readily in a solid a liquid a gas

  33. The particles of a substance that does not have a definite volume or shape is a solid 2. a liquid 3. a gas

  34. Attractive forces are very strong between particles in 1. a solid 2. a liquid 3. a gas 4. plasma

  35. When a liquid becomes a solid, energy does not change is released is absorbed is first absorbed, then released

  36. _______ is the process in which liquid changes to gas. 1. Sublimation2. Condensation 3. Evaporation4.Combustion

  37. The change of a liquid to a solid is called 1. freezing 2. melting 3. sublimation 4. vaporization

  38. When substances go directly from the solid phase to the gas phase, the phase change is called 1. sublimation 2. condensation 3. evaporation 4. vaporization

  39. For the following pictures, identify whether a physical or chemical change is occurring.

  40. Physical

  41. Chemical

  42. Chemical

  43. Physical

  44. Physical

  45. Chemical

  46. Chemical

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