Properties of Substances and Elements

How do the properties of substances help us to classify and separate them?

• By their physical and chemical properties

• By their color and size only

• By their state of matter at room temperature

• By their taste and smell

Why are atoms of elements different from one another?

• Because of the different number of protons in their nuclei.

• Because of the different number of electrons.

• Because they are made of different fundamental particles.

• Because of the different temperatures they are exposed to.

Are there patterns in the properties of elements?

• Yes, there are periodic trends

• No, there are no identifiable patterns

• Only in metal elements

• Only in non-metal elements

What binds atoms together in elements and compounds?

• Ionic bonds

• Covalent bonds

• Metallic bonds

• All of the above

Research and complete the following table with the boiling points of the given elements:

What is the activity described in Activity Sheet 4.1 by Davis & Smith, 2018?

• State of matter at room temperature

• Chemical reactions of metals

• Photosynthesis process in plants

• Evolution of the solar system

Label the elements of the seven bottom-most peaks and provide a rationale for their low melting points.

Label the elements of the three highest peaks.

• Mount Everest, K2, Kangchenjunga

• Mount Everest, K2, Lhotse

• K2, Kangchenjunga, Lhotse

• Mount Everest, Kangchenjunga, Lhotse

Name the element of the highest peak. Why do you think it has the highest melting point?

• Carbon

• Tungsten

• Iron

• Osmium

Are the elements above the orange dotted line solid, liquid or gaseous? Justify your answer.