The Periodic Table Details/Definitions

Question 1

Physical properties of alkali metals(Group 1)

Answer 1

-Good conductors of heat/electricity
-Soft
-Low density
-Low melting/boiling points
-Silvery colour

Question 2

General trends down Group 1(alkali metals)

Answer 2

-Melting point decreases
-Density increases
-Reactivity increases

Question 3

colour and state of the ionic compounds that alkali metals form

Answer 3

white solids

Question 4

Alkali metals dissolve in water to give…

Answer 4

colourless solutions

Question 5

Properties of halogens(Group 7)

Answer 5

-form coloured gases
-are poisonous
-form diatomic molecules

Question 6

General trends down Group 7(halogens)

Answer 6

-Colour gets deeper/darker
-Density increases
-Boiling points increase
-Reactivity decreases

Question 7

Halides

Answer 7

compounds that are a result of a reaction between a halogen and another element

Question 8

Chlorine(at r.t.p.)

Answer 8

pale yellow-green gas

Question 9

Bromine(at r.t.p.)

Answer 9

red-brown liquid

Question 10

Iodine(at r.t.p.)

Answer 10

grey-black solid

Question 11

Fluorine(at r.t.p.)

Answer 11

pale yellow gas

Question 12

What happens in the displacement reactions of halogens and other halide ions?

Answer 12

The halogen will displace the less reactive halogen from a solution of its halide
(if the halogen in the halide is more reactive, nothing happens)

Question 13

Properties of noble gases(Group 0)

Answer 13

-Colourless
-Monatomic
-Unreactive

Question 14

Physical properties of transition elements

Answer 14

-Hard
-High melting points
-Good conductors of heat/electricity
-High density

Question 15

Chemical properties of transition elements

Answer 15

-Much less reactive than alkali metals
-No clear trend in reactivity
-Form coloured compounds
-Often act as catalysts as elements and in compounds
-Variable valency

Question 16

Periodic Table

Answer 16

an arrangement of elements in periods and groups and in order of increasing proton number/atomic number