Chapter 2- The Periodic Table

Question 1

Who is the most credited person for the periodic table?

Answer 1

Dmitri Mendelev

Question 2

Did he arrange ALL elements?

Answer 2

No he left gaps for others to be discvoered.

Question 3

How is the periodic table arranged?

Answer 3

In order of increasing atomic mass

Question 4

How many periods are in the periodic table?

Answer 4

7

Question 5

What will the period correspond to?

Answer 5

How many shells that element has

Question 6

Vertical colums are….

Answer 6

Groups

Question 7

What do the groups correspond to?

Answer 7

The number of electrons in the last shell.

Question 8

How many blocks are in the periodic table?

Answer 8

4

Question 9

What is block s

Answer 9

groups 1&2

Question 10

What is block p

Answer 10

groups 13-18

Question 11

What is block d

Answer 11

groups 3-12

Question 12

What is block f

Answer 12

“inner transition elements”

Question 13

Summarise trends in the periodic table for atomic size

Answer 13

Increase down a group and decrease across as period

Question 14

Why does the atomic size increase down a group?

Answer 14

Electrons are added to higher energy levels, they move further away from the nucleus

Question 15

Why does the atomic radius decrease across a period?

Answer 15

Each element has an extra proton and electron than the previous element. therefore the attraction force increase and pulls the electrons closer towards the nucleus.

Question 16

Define Ionisation Energy

Answer 16

The energy required to remove an electron from a single atom

Question 17

Summarise trends in the periodic table for ionisation energy

Answer 17

Decreases down a group and increases across a period

Question 18

Why does the ionisation energy decrease down a group?

Answer 18

Atomic size is increasing and electrons are moving furhtue away from the nucleus therefore more easily removed

Question 19

Why does the ionisation energy increase across a period?

Answer 19

Electrons have a higher attraction for the nucleus and have a stronger connection, therefore harder to remove.

Question 20

Define electronegativity

Answer 20

Degree in which an atom can attract an electron to itself.

Question 21

What are the lease electronegative?

Answer 21

Francium and Caesium (0.7)

Question 22

What are the most electronegative?

Answer 22

Fluorine (4.0)

Question 23

Summarise trends in the periodic table for electronegativity

Answer 23

• Across a period from left to right it increases

- Down a group the electronegativity decrease

Question 24

What is metalliac characteristics in regards to the periodic table?

Answer 24

-Are determined by how easy it is to loose one of its electrons

Question 25

Summarise trends in the periodic table for metalliac character

Answer 25

• Decrease across a period

- Increase down a group

Question 26

Define Oxidising Strength

Answer 26

How readily an element gains electrons.

Question 27

Define Reducing Strength

Answer 27

How readily an element looses electrons

Question 28

Summarise trends for reactivity

Answer 28

Metals
Across a period decreases
-Down a group increases
Non-Metals
Across a period increases
Down a group decreases

Question 29

Are cations or anoins smaller?

Answer 29

Cations