Table Manners
This number tells you how many protons an atom has.
What is the atomic number?
These metals in Group 1 are extremely reactive.
What are alkali metals?
This noble gas has the smallest radius in Period 2.
What is neon?
This property measures an atom’s pull on shared electrons.
What is electronegativity?
These elements are shiny, malleable, and good conductors of heat and electricity.
What are metals?
These vertical columns contain elements with similar properties.
What are groups?
This family includes fluorine and chlorine and easily forms salts.
What are halogens?
Atomic radius increases in this direction on the periodic table.
What is down and to the left?
This group contains the most electronegative elements.
What are the halogens?
Brittle, dull appearance, and poor conductivity describe this type of element.
What are nonmetals?
These rows indicate the number of energy levels an atom has.
What are periods?
These gases almost never react because of full valence shells.
What are noble gases?
This type of ion is always smaller than its neutral atom.
What is a cation?
Helium has high ionization energy because electrons are close to this particle.
What is the nucleus?
This is the reason nonmetals tend to gain electrons rather than lose them.
What is high electronegativity?
This scientist predicted unknown elements using periodic patterns.
Who is Mendeleev?
Group 2 metals form +2 ions and are less reactive than alkali metals.
What are alkaline earth metals?
Transition metal radii shrink slightly across a period because this increases.
What is nuclear charge?
This element in Period 3 has the highest electronegativity.
What is chlorine?
Put these elements in order of increasing metallic character: Si, C, Sn.
What is C → Si → Sn?
These elements sit along the staircase and have mixed properties.
What are metalloids?
Elements in Group 15 all have this many valence electrons.
What is 5?
Atomic radius depends on energy levels and this attractive force.
What is the pull from the nucleus?
Ionization energy decreases down a group due to this effect.
What is shielding?
Put these elements in order of increasing metallic character:
F, N, P, As