Elements
How many elements are on the periodic table?
118
Who invented the periodic table?
Dmitri Mendeleev
What is another name for groups?
Families
What is another name for period?
rows
What three parts of an atom?
electrons, protons, and neutrons
What is Fe?
Iron
When was the periodic table invented?
1869
How many groups are there?
18
7
What is the center part of an atom?
nucleus
True or False: The element symbol is always just capital letters.
False, the second letter is always lowercase.
What are the three part of the table?
non-metals, metals, and metalloids
Why are the elements in the group they are?
They have the same number of valence electrons.
Why are the elements in the row they are?
They have the same number of shells.
What is found in the nucleus?
protons and neutrons
What is hydrogen classified as?
non-metal
7
What is group 18?
Noble gases
As the elements goes one to the next do they lose or gain an proton?
gain
How many can the first shell hold?
two
What is the symbol for Helium?
He
What are the two bottom rows called?
lanthanides and actinides
What groups are the transition metals?
What are the two elements in row one?
Hydrogen and Helium
What are the electrons in the outer shell called?
valence electrons