a munyra arsad 17 éve
1317
Molecules & Ions
Molecules & Ions
covalent compounds
certain compounds have special names
e.g ammonia
e.g water
prefix added to distinguish number of atoms.
e.g carbon monoxide (CO)
ionic compounds
exist polyatomic ions with special names
e.g Iron (II) Nitrate
e.g Ammonium Chloride
negative ions are ANIONS
positive ions are CATIONS
covalent bonding
e.g HCl [Hydrogen Chloride], NO [Nitrogen Oxide]
arises as 2 non-metals both need to gain electrons in order to achieve noble gas sturtures
Subtopic
electron clouds of atoms overlaping, resulting in electrons sharing
between atoms of non-metals
ionic bonding
e.g NaCl [sodium chloride]
transfer of electrons from the metal to the non-metal atom
between atoms of 1 non-metal and metal
elements
substances in their simplest form
e.g Carbon
e.g Hydrogen
isotopes
e.g Isotopes of Hydrogen
contain different number of neutrons
atoms with identical atomic number but different mass number.
atoms
contain 3 basic particles
electrons
neutrons
protons
smallest particles of the element which still retain the chemical properties of an element
