-Consist of Electrons surrounding the Nucleus, which includes Protons and Neutrons.
-Number of Protons in an atom is the atomic number.
-Atoms have shells.. For example Hydrogen has one shell (With one Electron).
Protons have a Positive charge (+1)
Neutrons have a Neutral chare (0)
Electrons have a Negative charge (-1)
The MASS number is the Top number.
The ATOMIC number is the bottom number.
Remember it like this -
Atomic bombs hit the floor. (ATOMIC is BOTTOM)
MASS is the opposite!
-Compounds are chemically bonded.
(Formed when two or more elements react, Carbon and Oxygen makes Carbon Dioxide)
-ISOTOPES are different atomic forms of the same element.
(Carbon 14, Carbon 12.)
These just have a different number of Neutrons.
Group One - Alkali Metals.
Group Seven - Halogens
Groupd 0 - Noble Gases.
Questions on ATOMS.
What is inside the Nucleus? (Protons and Neutrons.)
What charge does a Proton and Neutron have. (P= +1, N= 0)
Which number is the mass number and which is the Atomic? (Mass = Top, Atomic = Bottom)