Science Test Revision Periodic Tables And Corrosion Flashcards
Properties of non metals
Good oxidising agents, forms acidic agents, higher electronegativity, poor conducter of heat and electricity, no luster
Properties of metals
Malleable, opaque, ductile, luster, good conducters of heat and electricity
Metals in periodic table
Bottom left, iron, gold, silver
Non metals in periodic table
Far left, hydrogen, helium, carbon
Solids at room temperature
Sodium, lithium, berilium, calcium, sulfur
Liquids at room temperature
Bromine, mercury
Gases at room temperature
Hydrogen, nitrogen, oxygen, fluorine, chlorine
Mixture
Physically mixing 2 or more substances e.g. mud, smog
Compound
Chemically mixing 2 or more diff atoms e.g baking soda, water
Element
Chemically pure substance e.g helium, oxygen
Molecule
Group of atoms bonded together e.g water, salt
Matter
Made up of atoms e.g apple, person
Atoms
Exists in diff forms e.g elements, molecules, compounds
Combustion
Substance reacts with oxygen like wood, wick, gas, petrol
How to stop combustion
By removing fuel, heat, oxygen
Galvanizing
Applying zinc coating
Alloying
Mixing metals or elements to form protective layer
Coating
Coating surface with paint or enamel
Combustible substances burn above
37.8
Flammability
How easily something burns or ignites
Corrosion
Chemical reaction, metal reacts with oxygen
Rusting
Iron reacts with oxygen
Diff between corrosion and rusting
Corrosion for all metals and rusting is for iron
Metal+non metal=
Metal names 1st, non metal becomes IDE
3/3+ elements combine and 1 is oxygen,
Metal named 1st, ending becomes ATE
When 2 identical elements combine,
Name doesn’t change
When 2 non metal elements combined,
Use di, trip, tetra, pentra
