The structure of matter

What are mixtures?

• Pure substances and elements

• Compounds

• Different substances are mixed and combined chemically

• Different substances are mixed, but not combined chemically

Elements are...

• Consist of atoms of two or more elements

• Composed of the same type of atoms

• Represented by atomic symbols

• Represented by a chemical formula

If a mixture is completely uniform, then it is a .....mixture.

What's true about the solid state?

• the particles move quickly

• the particles are loosely packed

• There are strong forces between the particles

• Solid substances take the shape of their container

How do we call this phase transition? The gas turns into a liquid is called...

• Condenzation

• Vaporization

• Sublimation

• Melting

Select the physical properties.

• Colour

• Density

• Acid/base

• Reducing/oxidizing

Choose the true statements about the atomic theory.

• All matter is composed of atoms.

• An element is composed of only one type of atoms

• Aristotle created the atomic theory.

• Dalton created the atomic theory.

The electrons have...

• Particle-like behavior

• Wave-like behavior

• Particle- AND wave-like behavior

• unpolite behavior