C9

Question 1

Periodic table

Answer 1

method of classifying elements and its used to predict properties of elements

Question 2

Transition elements

Answer 2

collection of metals having high densities, high melting points and forming coloured compounds, and
which, as elements and compounds, often act as catalysts (lightbulb filaments, steel nails, copper wiring, iron horseshoes)

Question 3

Noble gases

Answer 3

unreactive, monoatomic gases(provides an inert atmosphere)

Question 4

Group 1 characteristics

Answer 4

• soft metal
  -react with water to form metal hydroxide + hydrogen gas
  -low melting points
  -low density
  -very reactive
  -alkali metals with one valence electron

Question 5

Group 7 characteristics

Answer 5

-known as halogens
-diatomic
-seven valence electrons
- most reactive non-metal
-Produce strong acids when reacting with H in H2O

Question 6

Group 1 trends downwards

Answer 6

-Increasing reactivity
-increasing density and size
-decreasing melting and boiling point

Question 7

Group 7 trends downwards

Answer 7

-Decreasing reactivity
-increasing density and size
-increasing melting and boiling point
-become darker

Question 8

Use of noble gases

Answer 8

provide an inert atmosphere e.g argon in lamps, helium filling balloons

Question 9

Metallic trends across a period

Answer 9

-elements get smaller
-go from metals to metalloids to non-metals

Question 10

Groups 1,2 & 3 are?

Answer 10

more metallic

Question 11

Groups 4-8 are?

Answer 11

less metallic/non-metallic

Question 12

Define Metallic Character

Answer 12

Tendency of an element to lose its outer electrons to form a full valence shell, making it a positive ion.