Chei periodic table guide A One Page Periodic Table Guide

[Pages:1]che_i periodic_table_guide

A One Page Periodic Table Guide

09 /25/02

Atomic Particles

Name

S Mass Charge

proton

p+ 1

+1

neutron

n0 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.

Atomic Structure (Bohr) Diagrams

1st electron shell

2nd electron shell

Ne

3rd electron shell e-

10 p + 10 n0

nucleus

Electron shells are filled from 1st shell outwards.

Shell Max.e1st 2 2nd 8 3rd 18 (8)

11 p + 12 n0

Na

Group 1A

11 Period 1 H

First Three Rows of the Periodic Table (Main Group Elements)

Group 8A

22 He

Atomic Number (No. of protons)

1.0079

Hydrogen

2A

3A 4A

4.0026

5A

6A

7A Helium

3 2 4 2 5 2 6 2 7 2 8 2 9 2 10 2 Period 2 Li 1 Be 2 B 3 C 4 N 5 O 6 F 7 Ne 8

6.941 9.0122 10.81 12.011 14.007 15.999 18.998 20.179

Lithium

Beryllium

Boron

Carbon

Nitrogen

Oxygen

Fluorine

Neon

Symbol Atomic Mass

62 C4

12.011

Carbon

Electrons in 1st shell*

Electrons in 2nd shell*

11 2 12 2 13 2 14 2 15 2 16 2 17 2 18 2

Period 3 Na

8 1

Mg

8 2

Al

8 Si

3

8P

4

8S

5

8 Cl 8 Ar 8

6

7

8

22.990 24.305 26.982 28.086 30.974 32.06 35.453 39.948

Sodium

Magnesium Aluminum

Silicon

Phosphorus Sulfur

Chlorine

Argon

Element name

*A circle around the number means the shell is full.

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