Unit 1D the periodic table

Question 1

what are the horizontal rows called ?

Answer 1

periods

Question 2

what are the vertical columns are called?

Answer 2

groups

Question 3

why does Elements in the same group have similar chemical properties ?

Answer 3

because they have simialr no. of electrons in their outer shell

Question 4

what are physical properties ?

Answer 4

are characteristics of substance whohc dont involve reactions

Question 5

what are chemical properties?

Answer 5

is to show how reactive a substance is,a dn what chemical reactions it can do

Question 6

what are the properties of metals

Answer 6

• dense
• good conductor of electricity
• good conductors of heat
• shiny
• ductile
• malleable

Question 7

what is the properties of a non metals?

Answer 7

• poor conductors of electricity
• poor conductors of heat
• dull
• brittle
• low melting point

Question 8

what is the properties of a non metals?

Answer 8

• poor conductors of electricity
• poor conductors of heat
• dull
• brittle
• low melting point

Question 9

Experiments to show that magnesium is a metal :Electrical conductivity test: conducts electricity

Answer 9

Magnesium burns to form magnesium oxide. Dissolving magnesium oxide in water, and testing pH shows it to be an alkaline solution.

Question 10

Experiments to show that sulfur is a non-metal.
Electrical conductivity test: Sulfur does not conduct electricity.

Answer 10

Sulfur burns with a blue flame to form sulfur dioxide. Dissolving it in water, and testing for pH: acidic solution