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Atomic Guide Drawing Example
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Atomic Particles Name S Mass Charge Proton p 1 +1 Neutron n 1 0 Electron e 0 -1 Guide to the Periodic Table 1. The periodic table is composed of element boxes. Each box contains an element's atomic number, atomic mass, name and symbol. 2. The element boxes are arranged in a table of 7 rows and 18 columns. 3. The columns are called groups and represent elements that have similar chemical properties due to the same number of electrons in their last shell. 4. The rows are called periods. Elements in a row are arranged by increasing atomic number. 5. The period number is the number of the electron shell that elements of that period are filling. Elements of a row have different chemical properties. First Three Rows of
the Periodic Table
(Main Group Elements) 12 6 Carbon C 2 4 Atomic Number
(No. of protons) Symbol Element name Electrons
in 1st shell* Electrons
in 2nd shell* *A circle around the
number means the
shell is full. 7 1 3 Lithium Li 2 9 4 Beryllium Be 2 2 24 12 Magnesium Mg 2 2 8 1 1 Hydrogen H 1 23 11 Sodium Na 2 1 8 4 2 Helium He 2 11 5 Boron B 2 3 12 6 Carbon C 2 4 14 7 Nitrogen N 2 5 16 8 Oxygen O 2 6 19 9 Fluorine F 2 7 20 10 Neon Ne 2 8 27 13 Aluminum Al 2 3 8 28 14 Silicon Si 2 4 8 31 15 Phosphorus P 2 5 8 32 16 Sulfur S 2 6 8 35 17 Chlorine Cl 2 7 8 40 18 Argon Ar 2 8 8 Group 1A 2A 3A 4A 5A 6A 7A Group 8A protons
+ neutrons
Atomic Mass Ne 10 p+
10 n0 3rd electron shell 1st electron shell 2nd electron shell nucleus e- Shell Max. e- 1st 2nd 3rd 2 8 18 Na 11 p+
12 n0 Electron shells are
filled from 1st shell
outwards. Atomic Structure Diagrams Atomic Guide
the Periodic Table
(Main Group Elements) 12 6 Carbon C 2 4 Atomic Number
(No. of protons) Symbol Element name Electrons
in 1st shell* Electrons
in 2nd shell* *A circle around the
number means the
shell is full. 7 1 3 Lithium Li 2 9 4 Beryllium Be 2 2 24 12 Magnesium Mg 2 2 8 1 1 Hydrogen H 1 23 11 Sodium Na 2 1 8 4 2 Helium He 2 11 5 Boron B 2 3 12 6 Carbon C 2 4 14 7 Nitrogen N 2 5 16 8 Oxygen O 2 6 19 9 Fluorine F 2 7 20 10 Neon Ne 2 8 27 13 Aluminum Al 2 3 8 28 14 Silicon Si 2 4 8 31 15 Phosphorus P 2 5 8 32 16 Sulfur S 2 6 8 35 17 Chlorine Cl 2 7 8 40 18 Argon Ar 2 8 8 Group 1A 2A 3A 4A 5A 6A 7A Group 8A protons
+ neutrons
Atomic Mass Ne 10 p+
10 n0 3rd electron shell 1st electron shell 2nd electron shell nucleus e- Shell Max. e- 1st 2nd 3rd 2 8 18 Na 11 p+
12 n0 Electron shells are
filled from 1st shell
outwards. Atomic Structure Diagrams Atomic Guide