Elements From The Sea

Question 1

What state must the atom/ion be for ionisation to take place?

Answer 1

• gaseous state

* the removal of an e- from a gaseous atom/ion

Question 2

Down group 17 what happens to the oxidising power of the halogen elements/atoms?

Answer 2

• it decreases

* as the atoms get larger they become less able to accept e- and act as ox. agents

Question 3

Down group 17 what happens to the reducing power of the halide ions?

Answer 3

• it increases

* as the size of the halide ions increase they become more likely to lose an e- and act as red. agents

Question 4

In an equilibrium pressure only affects….?

Answer 4

The molecules of gas present

Question 5

How does a catalyst work in an equilibrium?

Answer 5

• it increases the rate of he reaction but it has no effect on the position to the equilibrium

Question 6

What colour is nitrogen dioxide (@ RTP)

Answer 6

• brown gas

Question 7

What colour is iodine (I2)?

Answer 7

• brown

Question 8

What colour is the iodide ion?

Answer 8

• colourless