Metals, Non-Metals, Atomic Structure, Elements, Compounds, and Mixtures

What are the physical properties of metals?

• Low electrical conductivity, dull appearance, brittleness, low density

• Low thermal conductivity, opaque appearance, rigidity, low density

• Low electrical conductivity, opaque appearance, malleability, low density

• High electrical and thermal conductivity, luster, malleability, ductility, high density

Give an example of a non-metal element.

• oxygen (O)

• nitrogen

• sodium

• helium

What is the atomic structure of an atom?

• Protons and electrons in the nucleus, surrounded by neutrons

• Nucleus with protons and neutrons, surrounded by electrons

• Electrons in the nucleus with protons and neutrons

• Nucleus with protons and electrons, surrounded by neutrons

How many elements are there in the periodic table?

• 150

• 92

• 118

• 64

Define a compound and provide an example.

• Nitrogen (N)

• Oxygen (O)

• Carbon (C)

• Water (H2O)

Explain the process of distillation in the separation of mixtures.

• Distillation involves freezing a liquid mixture to separate components.

• Distillation involves mixing a liquid mixture with a solid to extract components.

• Distillation involves filtering a liquid mixture to isolate components.

• Distillation involves heating a liquid mixture to create vapor, then cooling and condensing the vapor to obtain separate components based on their boiling points.

Name a metal that is a good conductor of electricity.

• Copper

• Aluminum

• Gold

• Iron

Differentiate between an element and a compound.

• An element consists of only one type of atom, whereas a compound consists of two or more different types of atoms bonded together.

• An element and a compound are the same thing.

• An element consists of two or more types of atoms, whereas a compound consists of only one type of atom.

• An element is a mixture of different atoms, whereas a compound is made up of the same type of atom.

What is the chemical symbol for gold?

• Au

• Ag

• Fe

• Cu

What is the chemical formula for table salt?

• NaCl

• H2O

• CO2

• CaCO3