Year 8 Term 2 - Compounds Flashcards
A ….. contains two or more ….. that are …… combined in fixed …….
Compound, elements, chemically, positions
How are compounds named?
Based upon elements within them
If 2 elements only are present how do you name the formula
Change the end of the second to -ide
E.g: oxygen to oxide
Hydrogen to hydride
If there is a metal (e.g sodium), hydrogen and oxygen how do you name it
Sodium hydroxide
If there is a metal, another element and oxygen how do you name it
Change end of second element to -ate
E.g: calcium carbonate
Sodium bromate
Copper oxide - what do elements look like and what does compound look like
Copper: shiny red/orange solid
Oxygen: colourless gas
Copper oxide: black/red solid powder
Silicon dioxide - what do elements look like and what does compound look like
Silicon: shiny grey solid
Oxygen: colourless gas
Silicon dioxide: white powder
Copper sulfate - what do elements look like and what does compound look like
Copper: shiny red brown solid
Sulfur: yellow powder
Copper sulfate: blue powder
Iron sulfide - what do elements look like and what does compound look like
Iron: shiny silver grey solid
Sulfur: yellow/green powder
Iron sulfide: dull, black solid
Copper carbonate - what do elements look like and what does compound look like
Copper: orange/brown solid
Carbon: black powder
Oxygen: colourless gas
Copper carbonate: green powder
Iron sulfate - what do elements look like and what does compound look like
Iron: shiny grey solid
Sulfur: yellow powder
Oxygen: colourless gas
Iron sulfate: blue/green solid crystals
How is copper different from copper oxide
Copper is orange brown but copper oxide is a black powder
How is silicon different from silicon dioxide
Silicon is dark but silicon dioxide is whtie
How is copper different from copper sulfate
Copper is orange brown but copper sulfate is blue
How is Sulfur different from copper sulfate
Sulfur is yellow but copper sulfate is blue
How is iron different from iron sulfide
Iron is shiny but iron sulfide is dull
How is Sulfur different from iron sulfide
Sulfur is yellow/green but iron is grey
How is copper different from copper carbonate
Copper is orange but copper carbonate is green
How is carbon different from copper carbonate
Carbon is black but coppper carbonate is green
How is iron different from iron sulfate
Iron is grey but iron sulfate is blue/green
How is Sulfur different from iron sulfate
Sulfur is yellow but iron sulfate is blue/green
Some compounds contain groups of ….. to form …..
Atoms, molecules
A molecule of e particular compound will always contain .……. of each element, joined together …
Same number of atoms, in the same way
Carbon monoxide has
1 oxygen to 1 carbon
