The Periodic Table (VCE SSCE Chemistry): Flashcards
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Who developed first periodic table & when?
Who developed first periodic table & when?
Dimitri Mendeleev in 1869
When was gallium found after Mendeleev predicted it?
When was gallium found after Mendeleev predicted it?
Five years later
What is atomic number?
What is atomic number?
Number of protons in an atom
What does period number indicate?
What does period number indicate?
Number of occupied electron shells
Valence electrons for groups 1-2?
Valence electrons for groups 1-2?
Equal to group number
Valence electrons for groups 13-18?
Valence electrons for groups 13-18?
Group number minus 10
Name of group 1 (excluding hydrogen)?
Name of group 1 (excluding hydrogen)?
Alkali metals
Name of group 17?
Name of group 17?
Halogens
Name of group 18?
Name of group 18?
Noble gases
Total known elements in periodic table?
Total known elements in periodic table?
118