The nature of matter

Question 1

Matter

Answer 1

Anything which has mass and takes up space (Solid, gas, and liquid)

Question 2

Volatile

Answer 2

Liquid with a relatively low boiling point.

Question 3

Effects of impurity

Answer 3

Lowers the melting point and increase the boiling point

Question 4

Rf

Answer 4

Distance moved by the substance/distance moved by the solvent front.

Question 5

Elements

Answer 5

Substances that cannot be chemically broken down into simpler substances

Question 6

Compounds

Answer 6

Pure substances made from 2 or more elements chemically combined together.

Question 7

Decomposition

Answer 7

When Compound breaks down to form two or more substances

Question 8

Isotopes

Answer 8

Atoms of the same element which has the same proton number but a different nucleon number.

Question 9

Properties of isotopes

Answer 9

• The atoms have the same number of protons
  and electrons, but diff erent numbers of
  neutrons in their nuclei.
• Isotopes of an element have the same chemical
  properties because they have the same electron
  structure.
• Some isotopes have unstable nuclei; they
  are radioisotopes and emit various forms of
  radiation.

Question 10

Uses of isotopes

Answer 10

Industrial: Nuclear power stations, Medical: Cancer treatment