I'm so happy!
Periodic Dilemmas
Can't wait for summer
Mondays are Bad
Science is my Favorite
100
What is the main group of elements called
representative metals
100
who created the first correct periodic table
John Mosley
100
What is the name of the metals in group 2?
alkaline earth metals
100
significant tool for scientist around the world
periodic table
100
Mendeleev arranged the elements in order of increasing ____?
What is mass?
200
name of metals in groups 3-12
What is transition metals?
200
The father of the periodic table
Dmitri Mendeleev
200
What group is called the halogens?
group 17
200
Transition metals good/bad conductors of heat and electricity?
What is good?
200
Mosley placed his elements in order of increasing ?
atomic number
300
metals that have two valence electrons or two electrons in their outer shells
What is alkaline metals?
300
unreactive nonmetals that do not react with other elements under normal conditions
What is noble gases?
300
Why did Mendeleev get credit for the periodic table?
published his work first
300
What are most elements on the periodic table?
What is metals?
300
What are the left - to - right rows on the periodic table called?
What is periods?
400
who is the father of the chemistry
lavoisier
400
what is atomic mass
value based on protons and neutrons
400
An arrangement in columns based on physical properties that repeat every 8th element
periodic table
400
How many elements were known by the end of the 1800's
70
400
Elements to the right of the zigzag line on the period table are called _____________.
What is nonmetals?
500
very reactive nonmetals
What is halogens?
500
another name for group I elements
What is alkali metals?
500
Reactivity goes up or down as you go down a group.
reactivity increases
500
Mendeleev's periodic table repeat every __________ elements.
What is seven? Remember his periodic table was wrong!!
500
What is an isotope?
Same number of protons - different number of neutrons
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