Periodic Properties

Which element in Period 2 has the greatest atomic radius?

• Be

• C

• Na

• Li

Of the halogens, which has the smallest radius?

• F

• Cl

• Br

• I

Which of the period 3 elements has the largest electronegativity

• Ar

• Na

• F

• Cl

Elements in a ..................have similar chemical properties.

• Group

• Period

• Both group and period

Elements that are in the same group have ______________.

• properties that are similar to each other and behave the same

• Same number of valence electrons

• both of the above

• None of these

As you move across a row (period) on the periodic table, the atomic radius

• Increases

• Decreases

• Remains the same

• First increases and then decreases

As you move across a row on the periodic table, ionization energy ______________________

• Increases

• Decreases

• First increases and then decreases

• First decreases and then increases

As you move down a group, atomic radius increases because

• Atomic number increases

• Nuclear charge increases

• Shells get added

• Number of shells remain the same

As you move across the periodic table from left to right, the atomic radius decreases. This is because

• the number of protons increases, so attraction to electrons increases

• the number of energy levels increases

• the number of electrons increases

• the atomic mass increases

Electronegativity is

• The energy required to remove an electron from an atom

• The energy released when an electron is added to the outermost shell of an atom

• The tendency of an atom to attract the shared pair of electron to itself when present in a compound

• The tendency of an atom to lose electron