1.1.2 Defining elements and compounds

• What is an element defined as?

  Pure substance with one atom
• Nonmetals like oxygen and carbon are good conductors of electricity.

  False
• What is the conductivity of metals in terms of heat and electricity?

  Good conductors
• Give an example of a metal that is a good conductor of electricity.

  Gold
• An element can be broken down into simpler substances by chemical reactions.

  False
• Arrange the following properties from highest to lowest for metals:

  1️⃣ Melting Point

  2️⃣ Boiling Point

  3️⃣ Conductivity
• What are the two categories into which the properties of elements can be categorized?

  Metals and nonmetals
• Gold is an element that consists solely of gold atoms.

  True
• What is an example of an element made of only one type of atom?

  Gold
• What state of matter are nonmetals often found in?

  Gases or solids
• What is the composition of an element?

  One type of atom
• What type of mixture has visibly different components?

  Heterogeneous
• Match the characteristic with its corresponding category:

  Composition ↔️ One type of atom (Element)

  Breakable ↔️ Yes, through chemical reactions (Compound)
• A homogeneous mixture has uniform composition throughout.

  True
• Compounds typically have high melting points because energy is needed to break the bonds holding elements together.

  True
• Why are most compounds poor conductors of electricity?

  Lack of free electrons
• Pure water conducts electricity well.

  False
• Arrange the following characteristics of compounds in a logical order.

  1️⃣ Made of different elements

  2️⃣ Chemically bonded

  3️⃣ Specific melting and boiling points

  4️⃣ Generally poor conductors
• According to the image, what is an element composed of?

  Identical atoms
• What is a compound composed of?

  Two or more elements
• A compound consists of only one type of atom.

  False
• Elements have a uniform structure of identical atoms.

  True
• What are the two types of pure substances?

  Elements and compounds
• Can elements be broken down into simpler substances?

  No
• Compounds can be broken down into their constituent elements.

  True
• Elements can be broken down through chemical reactions.

  False
• Metals have a low melting point compared to nonmetals.

  False
• How can a compound be broken down?

  Chemical reactions
• An element is composed of only one type of atom.

  True