properties of the elements

Question 1

discuss what is meant by properties of the elements

Answer 1

Properties of an element are sometimes classed as either chemical or physical. Chemical properties are usually observed in the course of a chemical reaction, while physical properties are observed by examining a sample of the pure element. The chemical properties of an element are due to the distribution of electrons around the atom’s nucleus, particularly the outer, or valence, electrons; it is these electrons that are involved in chemical reactions. A chemical reaction does not affect the atomic nucleus; the atomic number therefore remains unchanged in a chemical reaction.

Question 2

name the groups in the periodic table

Answer 2

1   Alkali metals
2  alkali earth metals
3-12   Transition metals
13-15   Not all metals
17 halogens
18 Noble gases

Question 3

3 examples and reactions of group 1 Alkali metals

Answer 3

Sodium, pottasium and

highly reactive
solid
stored in oil
low density
low melting point
react with O to give metal oxides
react with water
good conductors elec and heat

Question 4

3 examples and reactions of Alkali earth metals

Answer 4

Magnesium, calcium and

less reactive than alkail metal group but still reactive
reacts to water to form gas and bases
good conductors heat and electric

Question 5

3 examples and reactions of group 3-12 Transition metals

Answer 5

Iron, gold

good conductors both
hard

Question 6

3 examples and reactions of group 13-15 Not all metals

Answer 6

dont

Question 7

3 examples and reactions of group 17 Halogens

Answer 7

Flourine, Bromine, Iodine

can be gas liquid or solid at room temp

They are non-metals
Low melting and boiling points
Brittle when solid
Poor conductors of heat and electricity
Have coloured vapours

Question 8

3 examples and reactions of group 18 noble gases

Answer 8

Radon, argon and Neon RAN

inert
non reactive