Table Of Elements Flashcards
0
Q
Difference between groups and periods.
A
Groups: vertical
Periods: horizontal
1
Q
Who organized the currently used periodic table and what was their process?
A
Dimitri Mendeleev. He put groups of elements that had similar physical and chemical properties together. He arranged the elements based on atomic mass.
2
Q
What are the tricks to making Bohr diagrams?
A
Elements have the same number of shells as their period number and the same number of valence electrons as their group number.
3
Q
Characteristics of alkali, alkaline earth, halogens and noble gases.
A
Alkali: highly reactive, low density
Alkaline earth metals: not as reactive as alkali, shiny, silvery
Halogens: lethal, unstable
Noble gases: stable unreactive
