Structure of the Periodic Table
The periodic table is made up of rows (periods) and columns (groups). The rows represent the number of electron shells in an atom, while the columns group elements with similar chemical properties.Organization of Elements
Elements are arranged left to right and top to bottom in order of increasing atomic number. This organization allows for the elements to be grouped based on their similar properties and chemical behaviors.Groups and Periods
There are 18 groups in the periodic table, and elements in the same group have similar outer electron configurations and therefore similar chemical properties. The periods represent the number of electron shells an atom has.Chemical Properties
The periodic table allows us to predict the chemical behavior of elements based on their position. Elements in the same group tend to have similar reactivity, while elements in the same period show trends in properties such as atomic size, ionization energy, and electronegativity.Key Elements
Some key elements to remember include hydrogen and helium in Group 1, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, and neon in Group 2, and so on.Uses in Chemistry
.◂Biology Worksheets and Study Guides High School. Lab investigations/scientific method
Worksheet/Answer key
Lab investigations/scientific method 
Worksheet/Answer key
Lab investigations/scientific method Worksheet/Answer key
Lab investigations/scientific method
Worksheet/Answer keyWorksheet/Answer keyThe resources above cover the following skills:
Earth and Space Science (ES)
Earth Processes
Explain how Earth's fluid outer core creates the magnetosphere and how this helps protect both humans and technology (such as satellites) from solar winds.