Atoms bond to make molecules and compounds

Multiple Choice

Which of the following statements is true?

• Atoms never bond together

• Atoms bond to form energy only.

• Atoms bond together to make molecules and compounds.

• Compounds are made of electrons only.

Multiple Choice

What is one learning goal of this topic?

• Memorising all the atomic numbers
  

• Drawing cells under a microscope

• Defining molecules, compounds, and mixtures

• Learning to use a Bunsen burner

Multiple Choice

Which best defines a molecular compound?

• A molecule with only one atom type

• A molecule with two or more different atom types

• A single unbonded atom

• A group of mixtures

Multiple Choice

Which of the following is a molecular element?

• CO₂

• H₂O

• O₂

• NH₃

Multiple Choice

Which of the following statements is true about compounds?

• They contain only one element

• They can be separated easily

• They are made of bonded atoms from different elements

• They have the same properties as the elements that make them

Multiple Choice

How are compounds different from mixtures?

• Compounds are made only in labs

• Mixtures are chemically bonded

• Compounds have fixed atom ratios; mixtures do not

• Mixtures cannot be separated

Multiple Choice

Which of these is a pure substance?

• Sugar solution
• Distilled water
• Saltwater
• Air

Multiple Choice

Which of the following statements is true about molecular compounds?

• They are made of only one type of atom.

• They are mixtures of atoms and molecules.

• They cannot be represented with chemical formulas.

• They are made of two or more different atoms chemically bonded.