Unit 5: Periodic Trends Test Review

Group

A vertical column on the periodic table.

Mendeleev

The scientist who first arranged the periodic table.

Atomic Number

The order in which elements in the periodic table are presently arranged.

Periodic Law

States that there are periodic patterns in the physical and chemical properties of elements when arranged by increasing atomic number.

Alkali Metals

Group 1 elements in the periodic table.

Transition Metals

The d block elements in the periodic table.

Ion

An atom with a positive or negative charge, which forms by losing or gaining electrons.

Energy levels

The number of occupied regions that determine the size of an atom.

it will Decrease

What happens to the size of an atom as you move across a period from left to right due to the increased number of protons

Increase

What happens to the size of atoms as you move down a group because of greater energy levels.

Ionization energy

The amount of energy required to remove the most loosely held electron from an atom.

It is always Greater

The amount of energy required to remove a second or third electron is always this in comparison to the first electron.

Noble gas

Potassium will have the same electron configuration as this before the second electron is removed.

Across a period

Ionization energy will increase as you move in this direction.

Down a group

Ionization energy will decrease as you move in this direction.

Less

The size of a positive ion compared to the size of the neutral atom from which it was made.

Greater

The size of a negative ion compared to the size of the neutral atom from which it was made.

4.0

The electronegativity value of Fluorine.

Chemical bond

Electronegativity is the ability of an atom to attract electrons when it is in this state.

Decrease

Electronegativity will do this as you move down a group.

18

The group in the periodic table that does not have defined values for electronegativity.

Increase

Electronegativity will do this as you move across a period.

Ca

The atom with the larger atomic radius between Mg or Ca.

Ga

The atom with the larger atomic radius between Ga or Br.

Mn

The atom with the smaller atomic radius between V or Mn.

Si

The atom with the smaller atomic radius between Sn or Si.

S

The atom with the larger first ionization energy between P or S.

Cl

The atom with the larger first ionization energy between Al or Cl.

F^-1

what ion is larger: F^-1 or F?

Cr^+2

What ion is larger: Cr^+3 or Cr^+

B

The atom with larger electronegativity between B or In.

Rb

The atom with larger electronegativity between Rb or Cs.

C, O, F

Arrange period elements in order of decreasing atomic size. (Largest to smallest): C, F, O

Cs, K, Li

Arrange group elements in order of decreasing atomic size (largest to smallest): K, Li, Cs

C, O, F

Arrange period elements in order of increasing ionization energy (smallest to largest): C, F, O

Cs, K, Li

Arrange group elements in order of increasing ionization energy (Smallest to largest): K, Li, Cs

F, O, C

Arrange period elements in order of decreasing electronegativity (largest to smallest): C, F, O

Li, K, Cs

Arrange group elements in order of decreasing electronegativity (largest to smallest): K, Li, Cs

K

The larger atom between Li or K.

Li

The atom that requires greater ionization energy between Li or K.

K

The atom with lower electronegativity between Li or K.

C

The larger atom between C or N.

N

The atom that requires greater ionization energy between C or N.

C

The atom with lower electronegativity between C or N.

Ca

The atom with the larger atomic radius between Mg or Ca.

Mg

The atom that requires greater ionization energy between Mg or Ca.

Ca

The atom with lower electronegativity between Mg or Ca.

S

The larger atom between O or S.

O

The atom that requires greater ionization energy between O or S.

S

The atom with lower electronegativity between O or S.