groups
periods
elements
history
random
100
What group is in the fourth column
What is transition metals
100
what gets added to each element each time when going right
What is a proton and electron
100
what is the first element on the periodic table
What is Hydrogen
100
who discovered the first atom
What is Democrits
100
what are the three parts of an atom
What is the protons, neutrons, and electrons
200
What is the second group called
What is Alkali earth metals
200
how many shells are in period 3
What is 3 shells
200
how many protons are in Cesium
What is 58
200
who discovered the electron
What is J.J. Thompson
200
what is the the groups of elements from 57-71
What is lanthanoids
300
what are rows 3-12 called
What is transition metals
300
what is the smallest period
What is period 1
300
what is the heaviest element
What is Oganesson
300
what adom model do you use today
What is The bohr model
300
how many elements are in the periodic table
What is 118
400
what is everything right of metalloids called
What is nonmetals
400
how many shells are in row 1
What is 1
400
how many neutrons are in iron
What is 30
400
What did Dmitri Medleau do.
What is make the periodic table
400
what does the symbol "Y" stand for
What is yttrium
500
what are metalloids
What is separating the metals from nonmetals
500
what period is the most radioactive
What is period 7
500
what elements are liquid at room temperature
What is mercury and bromine
500
Who described the nucleus
What is Ernest Rutherford
500
what two atoms make water
What is hydrogen and oxygen
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