First 243 words of the document:
Elements consist of one type of atom only, most of the elements
we can find in our everyday life. E.g. Copper, Iron, Oxygen,
Nitrogen and Aluminum.
Compounds are chemically bonded they are formed by two
elements or more chemically reacting together. Compounds are
difficult to separate back to the original elements again. However,
the properties of a compound are completely different to the
properties of the original elements.
Isotopes are different atomic forms of the same element, which has
the same amount of protons but a different amount of neutrons.
Remember there is no such thing as an isotope! So you must say
Ionic Bonding: SWAPPING ELECTRONS
In ionic bonding, atoms lose or gain electrons to form charged
particles (ions) which are then strongly attracted to one another
because of opposite charges. It's quite easy to understand, an atom
with one electron wants to get rid of that electron so that it has a full
shell. And an atom with 6 or 7 electrons wants to get more electrons
so that it has a full shell. To get/lose the electrons, the element has to
latch on to another atom so that it gains a full outer shell. The atoms
are not connected at the end. Ionic bonding is usually a reaction
between metals and nonmetals.
Other pages in this set
Here's a taster:
Group 1 and 2 elements lose electrons to form positive ions which are
also called cations.
Group 6 and 7 elements gain electrons to form negative ions which are
also called anions.
Giant Ionic structures:
Ionic bonds always produce ionic structures, because the ions form
closely packed regular lattice arrangement. There are 3 key things you
have to know about Giant Ionic structures:
Here's a taster:
The atoms are bonded together by strong covalent bonds.
They have high boiling and melting points.
They don't conduct electricity
They're usually insoluble in water
The outer electrons in each atom can easily move from one atom to the
next. So, the outer electrons form a `sea' of free electrons (delocalized
electrons) surrounding positively charged metal ions. Strong
electrostatic attraction between the negatively charged electrons and
positively charged ions bond the metal ions together.…read more