Trends
Has a larger radius: Sodium or Potassium?
Potassium
The most unreactive group of elements. (Name and location)
What are the noble gases in group 18?
A row on the periodic table.
Elements on the periodic table are arranged first and foremost by this fact about them.
What is atomic number?
Has a larger ionization energy: Rubidium or Strontium?
Strontium
The most reactive group of metals. (Name and location)
The trend associated with the size of a neutral atom.
What is atomic radius?
Elements that react in similar ways will be found in these.
What are groups/columns?
Why does atomic radius decrease as you go to the right across a period?
Increase in the charge of the nucleus leads to the electrons being pulled in closer.
The elements located in the d-block, f-block, and bottom left of the p-block.
What are the transition metals?
The energy required to remove an electron from an atom.
This chemist is considered the father of the periodic table.
Who is Dmitri Mendeleev?
Why does ionization energy decrease as you move down a group?
Inner shells of electrons shield valence electrons from the pull of the nucleus making it easier to remove valence electrons.
The most reactive group of non-metals. (Group name and location)
What are the halogens in group 17?
Electronegativity
What is the ability of an atom to attract electrons from another atom?
The reason that elements will react in similar ways is that they have similar ____________.
What is valence electron configurations?
Noble gases are excluded from the patterns in this trend.
What is Electronegativity? - they do not want electrons from any other atom.
The second most reactive metal group. (Name and location)
What are Alkaline Earth Metals, group 2?
The octet rule
What is the principle which states that all atoms want a full valence shell, usually 8 electrons.
Why is the periodic table called the periodic table?
The term periodic means that something happens occasionally, or regularly. If all elements were listed by atomic number, their reactivities would match up occasionally, or every period.