Q: Pekpek Quiz

• How can you determine if something is an element?

  They are listed on the periodic table
• What are the characteristics of elements?

  • Do not settle out
  • Pass through filter paper
  • Listed on the periodic table
• What happens to light when it passes through a solution?

  It scatters in colloids
• What is the particle size of suspensions?

  Largest particle size
• What are the types of mixtures?

  • Heterogeneous: different pieces visible
  • Homogeneous: uniform appearance, called solutions
• What is the solubility graph used for?

  To determine how much solute dissolves
• What happens to most compounds' solubility as temperature increases?

  They increase in solubility
• Which compound shows the greatest increase in solubility as temperature increases?

  Potassium nitrate
• What is a characteristic of compounds compared to elements?

  They have more than one element
• What are the characteristics of compounds?

  • Found in nature more often than pure elements
  • Chemically bonded elements
  • Fixed ratios by mass
  • Unique properties
• What are the properties of metals?

  Shiny, good conductors, malleable
• What are the properties of nonmetals?

  Dull, poor conductors, mostly gases
• What are the characteristics of metalloids?

  Semiconductors, properties of metals and nonmetals
• What are the classifications of matter?

  1. Elements
  2. Compounds
  3. Mixtures
• What is a pure substance?

  Made of only one type of particle
• How can elements be separated?

  They cannot be separated by physical means
• What are the differences between elements and compounds?

  • Elements: pure substances, one type of particle
  • Compounds: two or more elements, chemically bonded
• What is a pure substance?

  A sample of matter with definite properties
• What is an element?

  A pure substance that cannot be separated
• How can compounds be separated?

  Only by chemical means
• What defines a compound?

  Composed of two or more different elements
• What is a characteristic of mixtures?

  They are not chemically combined
• What happens to the properties of substances in a mixture?

  Each item retains its properties
• How can mixtures be separated?

  Physically
• What are the key differences between elements, compounds, and mixtures?

  • Elements: One type of atom
  • Compounds: Two or more different atoms joined
  • Mixtures: Two or more substances physically combined
• What is an atom?

  The smallest unit of an element
• What is a molecule?

  Two or more atoms joined together
• What is a particle in scientific terms?

  A general term for individual things
• What does air consist of?

  A mixture of elements and compounds
• What elements are found in air?

  Oxygen, argon, and nitrogen
• How do elements exist in air?

  As single atoms or molecules
• How can you identify elements, compounds, and mixtures in photos?

  • Elements: One type of atom
  • Compounds: Two or more different atoms
  • Mixtures: Two or more substances physically combined
• What is the composition of rocks?

  Mixture of minerals and compounds
• What is copper classified as?

  An element
• What are jelly beans classified as?

  A mixture
• What is table sugar classified as?

  A compound
• What is diamond classified as?

  An element
• What is tea classified as?

  A mixture
• What is salt classified as?

  A compound
• What is neon gas classified as?

  An element