6.2 Compound and mixture

What defines a compound?

A compound is a chemical substance made up of 2 or more different types of atoms that are chemically bonded.

What is a key characteristic of a compound in relation to its constituents?

The properties of a compound are different from the elements it is made from.

What is the ratio of elements in a compound?

The ratio of elements in a compound is fixed.

How can compounds be separated?

Compounds can only be separated by chemical methods such as electrolysis.

What is the distribution of particles in a compound?

Compounds are always homogeneous, meaning there is a uniform distribution of particles.

How does a mixture differ from a compound in terms of composition?

The composition of a mixture is not in a fixed ratio, and it shows the properties of all its constituent elements.

How can mixtures be separated?

Mixtures can be separated by physical methods like sieving or distillation.

What are molecular compounds?

Molecular compounds are made up of identical molecules that have the same number of atoms.

Name an example of a molecular compound and its constituent atoms.

Water (H2O) contains two hydrogen atoms and one oxygen atom.

List the six main elements found in the human body.

Oxygen, Carbon, Hydrogen, Calcium, Nitrogen, Phosphorus.

How do compounds exhibit different properties than the elements they are made from?

Compounds have physical and chemical properties that are different from the properties of the individual elements.

What is the property of sodium metal compared to sodium chloride?

Sodium metal is a soft, silvery-white metal, whereas sodium chloride (table salt) has different properties.

What do crystal lattices in compounds indicate?

Crystal lattices indicate that atoms are bonded very strongly in a structured arrangement.

What is the formula of a compound used for?

The formula gives the ratio of each element present in the compound.

For every atom of sodium in sodium chloride, how many atoms of chlorine are there?

For every atom of sodium, there is one atom of chlorine.