7.1/7.2 The Table And Ionization Energy

Question 1

Define periodicity

Answer 1

A repeating trend in properties across periods

Question 2

Define atomic radius

Answer 2

Half the shortest inter nuclear distance

Question 3

Define covalent radius

Answer 3

Half the distance between a nucleus and shared electrons in a single covalent bond

Question 4

In which direction on the table does atomic radius increase and why?

Answer 4

Left and down
Atoms with more outer electrons attract them closer to the nucleus shortening the atomic radius

Question 5

In which direction on the table does electronegativity increase?

Answer 5

Up and right

Question 6

What is ionisation energy?

Answer 6

A measure of how easily atoms lose electrons to form positive ions

Question 7

What is 1st ionisation energy?

Answer 7

Energy required to remove 1 mol of electrons from 1 mol or gaseous atoms of an element

Question 8

In which direction on the periodic table does melting point increase for metals?

Answer 8

Up and right