Studied by 8 people
who was Credited with the development of the periodic table
Dmitri Mendeleev
what did Mendeleev's use to arange his periodic table ?
Atomic mass
How Mendeleev arranged the elements in his periodic table
Order of increasing atomic mass
why were there Gaps left by Mendeleev in his periodic table
Elements yet to be discovered
what Additional information included by Mendeleev in his periodic table
Properties of the elements
How Mendeleev predicted the properties of missing elements
Trends and patterns
who is Credited with the modern periodic table
Henry Moseley
Basis for the modern periodic table
Atomic number
How the modern periodic table is arranged
Order of increasing atomic number
What the modern periodic table resolved based on atomic mass
Resolving anomalies
Number of periods in the modern periodic table
7 periods
Number of groups in the modern periodic table
8 groups
Elements in group 1 of the periodic table
Alkali metals
Elements in group 7 of the periodic table
Halogens
Elements in group 0 of the periodic table
Noble gases
what is in between group 2 and 3
transition metals
what is special about the ions transition metals form
they can sometimes form 2 or 3 difernt isotopes e.g. Fe 2+ OF Fe 3+
Note 
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