chemistry-Atoms, molecules, elements, compounds Flashcards
What is an Atom
A single particle made from protons, neutrons and electrons
what is a molecule
2 or more atoms combined together
what is an element
a chemical made up of only 1 type of atom
what is a compound
a molecule that contains more than 1 type of atom
what is pure
when it only contains one chemical
what are mixtures
different chemicals, that are not combined
what is a formula
combination of symbols that represents the chemical composition substance
on the periodic table what is hydrogen
H
on the periodic table what is carbon
C
on the periodic table what is nitrogen
N
on the periodic table what is
oxygen
on the periodic table what is sodium
Na
on the periodic table what is magnesium
Mg
on the periodic table what is Sulphur
S
on the periodic table what is chlorine
Cl
on the periodic table what is gold
Au
on the periodic table what is sodium chloride
NaCl
on the periodic table what is magnesium oxide
MgO
on the periodic table what is water
H2O
on the periodic table what is carbon dioxide
CO2
on the periodic table what is a hydrogen molecule
H2
on the periodic table what is a oxygen molecule
O2
what is a chemical reaction
when new products are made
what are reactants
chemicals that react together in a chemical reaction
