Science Test Periodic Table And Corrosion

Question 1

5 properties of non metals

Answer 1

Higher electronegativity, forms acidic agents, good oxidising agents, poor conducter of heat and electricity, no luster

Question 2

5 properties of metals

Answer 2

Opaque, ductile, malleable, luster, good conducter of heat and electricity

Question 3

Metals in periodic table

Answer 3

Bottom left, iron, gold, silver

Question 4

Non metals in periodic table

Answer 4

Far left, hydrogen, helium, carbon

Question 5

Solids at room temperature

Answer 5

Hydrogen, nitrogen, oxygen, fluorine, chlorine

Question 6

Liquids at room temperature

Answer 6

Bromine, mercury

Question 7

Gases at room temperature

Answer 7

Hydrogen, nitrogen, oxygen, fluorine, chlorine

Question 8

Mixture

Answer 8

Physically mixing 2 or more substances e.g mud, smog

Question 9

Compound

Answer 9

Chemically mixing 2 or more diff atoms e.g baking soda, water

Question 10

Element

Answer 10

Chemically pure substance e.g helium, oxygen

Question 11

Molecule

Answer 11

Group of atoms bonded together e.g water, salt

Question 12

Matter

Answer 12

Made up of atoms e.g apple, person

Question 13

Atoms

Answer 13

Exists in diff forms e.g elements, molecules, compounds

Question 14

Combustion

Answer 14

Chemical reaction, substance reacts with oxygen like wood, wick, gas, petrol

Question 15

How to stop combustion

Answer 15

Remove fuel, heat, oxygen

Question 16

Galvanizing

Answer 16

Applying zinc coating to steel or iron

Question 17

Alloying

Answer 17

Mixing metals or elements to form protective layer

Question 18

Coating

Answer 18

Coating surface with paint or enamel, providing barrier

Question 19

Combustible substances burn above

Answer 19

37.8

Question 20

Flammability

Answer 20

How easily something burns or ignites

Question 21

Substances are grouped as either

Answer 21

Flammable or combustible by their flashpoints

Question 22

Flashpoint

Answer 22

When lowest temp, vapours ignite

Question 23

Flammable substances burn below

Answer 23

37.8

Question 24

Corrosion

Answer 24

Chemical reaction, metal reacts with oxygen

Question 25

Rusting

Answer 25

Iron reacts with oxygen

Question 26

Diff between corrosion and rusting

Answer 26

Corrosion is for all metals and rusting is for iron