Elements , Mixtures and Compounds - Chemical Reactions Flashcards
What is an element?
Elements are made up of only ONE kind of atom.
What is a compound?
Compounds are where 2 or more DIFFERENT atoms join together. The atoms must be different!
What is a mixture?
Mixtures are where two or more different atoms are in the same space but aren’t chemically bonded. It can contain any combination of elements or compounds.
What is an atom?
Atoms are the simplest particles of matter. They are a small particle from which all substances are made.
What is a molecule?
Molecules are made when 2 or more atoms join together. The atoms in a molecule can be the same or different.
Name 5 things that react in a chemical reactions?
Any of these or more :
- Bath bombs
- Fire
- Explosion
- Coke + mentos
- Fuel
Magnesium + Oxygen = ?
What is the reaction?
Magnesium Oxide
Its reaction is a bright white light.
Magnesium + Sulphuric acid = ?
What is the reaction?
Magnesium Sulfate + Hydrogen
Its reaction is a squeaky pop when a flame is introduces and bubbles produces fizzing.
Lead nitrate + Potassium iodine = ?
What is the reaction?
Lead iodine + Potassium nitrate
Its reaction is change of colour.
Copper sulfate + Sodium hydroxide = ?
What is the reaction?
Copper hydroxide + Sodium sulfate
Its reaction is that a white solid formed.
Name the 5 signs of chemical reaction.
- Light / Sound produced / Sparks / Flames
- Colour change
- Solid formed
- Efferservance (Fizzing)
- Temperature change
What is a chemical reaction?
A chemical reaction always form one or more new substances.
When do you use ‘ate’ at the end of a chemical reaction?
Solve these sequences :
a) Zinc + sulfur + oxygen = ?
b) Iron + sulfur + oxygen = ?
c) Copper sulfate + Sodium hydroxide = ?
If a compound contains 2 or more elements in addition to oxygen, then the ending of the name of 1 element is changed to ‘ate’.
a) Zinc sulfate
b) Iron sulfate
c) Copper hydroxide + Sodium sulfate
When do you use ‘ide’ at the end of a chemical reaction?
If a compound contains 2 or more elements in addition to not having oxygen, then the ending of the name of 1 element is changed to ‘ide’.
Write a word sequence for the following.
What elements are in :
a) Lead nitrate
b) Magnesium Oxide
c) Mercury Oxide
a) Lead + nitrogen + oxygen
b) Magnesium + oxygen
c) Mercury + oxygen
