Topic 2 - structure (II)

Question 1

What do periods in the periodic table indicate?

Answer 1

Number of electron shells

Question 2

What do groups in the periodic table indicate?

Answer 2

How many electrons in outer shell

Question 3

Characteristics of METALS

Answer 3

• conduct electricity
• are on the left side of the periodic table
• good heat conductors
• shiny
• have high melting + boiling points
• high density
• ARE BASIC OXIDE
• have 1,2,3 electrons in outer shell (lose electrons easily).

Question 4

Characteristics of NON - METALS

Answer 4

• don´t conduct electricity (EXCEPT GRAPHITE)
• are on the right side of the periodic table
• poor heat conductors
• dull
• low density
• low melting + boiling points
• ARE ACIDIC OXIDE
• have more than 4 electrons in outer shell (gain electrons easily).

Question 5

Why do elements from the same group have similar chemical properties?

Answer 5

Because they have the same number of electrons in their outer shell.

Question 6

Why don´t noble gases react?

Answer 6

Because they are in Group 0 meaning that they have complete outer shells so they dont lose or gain electrons. (ARE UNREACTIVE)