Chapter 5 Section 3

The atomic radius of an atom that is chemically bonded to an identical atom is equal to

half the distance between the nucleus

Across a period in the
periodic table, atomic radii generally

decrease

down a group in the
periodic table atomic radii generally

increase

Which of the following elements has the greatest atomic radius?
Al
S
Si
C

Al

Which of the following elements has the smallest atomic radius?
Al
S
Si
C

C

As the atomic number increases within a group of elements, the atomic radius

increase

As electrons add to s and p sublevels in the same main energy level, they are pulled closer to the more highly charged nucleus, causing

the atomic radii to decrease in size

What can be removed from an atom if ionization energy is supplied?

an electron

for each successive electron removed from an atom, the ionization energy

increases

Across a period in the periodic table,
ionization energy generally

increases

Which of the following elements has the greatest ionization energy?
Ga
K
Bi
As

As

down a group in the periodic table the change in ionization energy is due to

increasing electron shielding

Which of the elements has an electron affinity of 0kJ/m?
Br
As
Ar
I

Ar {because it is a noble gas and they are already filled}

An element with the smallest anionic (negative-ionic) radius would be found on the periodic table in

Group 17 Period 2

As the atomic numbers of the metals of Group 1 Increase, the ionic radii

increases

an electron that is the highest energy level of an atom and determines the atom’s chemical properties is called a

valence electron

The number of valence electrons for Group 2 elements is

2

When a carbon atom is in its ground state, how many electrons does it have in its outermost shell?

4

One of the least electronegative elements would be found on the periodic table in

Group 1 Period 7

A measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound is called

electronegativity

Which of the following elements has the lowest electronegativity?
C
F
Li
O

Li

Which of the following elements has the greatest electronegativity?
C
F
Li
O

F

Which group contains atoms that in compounds, have the lowest attraction for electrons?

Group 1 or Group 18