Atoms, Elements & Compounds Flashcards
What are atoms?
All substances are made up of these. These are the ‘building blocks of chemistry’.
How many types of atoms are there?
About 100
What are elements?
These are the simplest substances, they are made up of only one atom.
What is a compound?
These are atoms of different elements chemically bonded together. They always keep the same ration, eg. H2O.
What is H?
Hydrogen
What is He?
Helium
What is Li?
Lithium
What is Be?
Beryllium
What is B?
Boron
What is C?
Carbon
What is N?
Nitrogen
What is O?
Oxygen
What is F?
Fluorine
What is Ne?
Neon
What is Na?
Sodium
What is Mg?
Magnesium
What is Al?
Aluminium
What is Si?
Silicon
What is P?
Phosphorus
What is S?
Sulphur
What is Cl?
Chlorine
What is Ar?
Argon
What is K?
Potassium
What is Ca?
Calcium
What is Fe?
Iron
What is Cu?
Copper
What is Zn?
Zinc
What is Ag?
Silver
What is Sn?
Tin
What is Au?
Gold
What is Hg?
Mercury
What is Pb?
Lead
What are the two forms of Carbon?
Graphite and Diamond
What are the horizontal rows called in the Periodic table?
Periods
What are the vertical columns called in the Periodic table?
Groups
What is a molecule?
Two or more atoms bonded together
What state are metals at in room temperature?
Solid
What state are non-metals in at room temperature?
Liquid/Gas
What kind of melting points do metals have?
High
What kind of melting points do non-metals have?
Low
What kind of density do metals have?
High
What kind of density do non-metals have?
Low
Are metals malleable/ductile?
Malleable
Are non-metals malleable/ductile?
Ductile
What dies mixture and heat make?
Mixture + Heat –> Compound
What is a mixture?
A mixture is not chemically bound together and can be separated easily. It does to have a fixed ratio.
What is a precipitation reaction?
A reaction in which a solid is created through a chemical reaction.
Is mass affected in a chemical reaction?
No, the mass is not affected, the atoms are only rearranged.
What do reactants make?
Reactants–> Products
What is diffusion?
The movement of particles
