Question

q) for potassium (k), we would expect a large increase in ionization energy to occur when the________electron is removed. this is because potassium will have the same electron configuration as________before that electron is removed.
r) ionization energy will increase as you move________________________and decrease as you move________________________.
s) the size of a positive ion is always__________________________than the size of the neutral atom from which it was made.
t) the size of a negative ion is always__________________________than the size of the neutral atom from which it was made.
u) fluorine has the highest electronegativity with a value of__________________________.
v) electronegativity is the ability of an atom to attract electrons to itself when the atom is in a__________________________.
w) electronegativity will__________________________as you move down a group.
x) the elements in group__________________________do not have defined values for electronegativity.
y) electronegativity will__________________________as you move across a period.

1. circle that atom with the larger atomic size:

a) mg or ca c) n or as
b) ga or br d) rb or sr

1. circle that atom with the smaller atomic size:

a) v or mn c) n or f
b) sn or si d) rb or sr

Explanation:

• 2a: Atomic size increases down a group. Ca is below Mg in Group 2, so Ca has a larger atomic size.
• 2b: In the same period, atomic size decreases from left to right. Ga is to the left of Br in Period 4, so Ga has a larger atomic size.
• 2c: Atomic size increases down a group. As is below N in Group 15, so As has a larger atomic size.
• 2d: In the same period, atomic size decreases from left to right. Rb is to the left of Sr in Period 5, so Rb has a larger atomic size.
• 3a: In the same period (Period 4), for transition metals, atomic size slightly decreases with increasing atomic number. Mn has a higher atomic number than V, so Mn has a smaller atomic size.
• 3b: Atomic size decreases up a group. Si is above Sn in Group 14, so Si has a smaller atomic size.
• 3c: In the same period (Period 2), atomic size decreases from left to right. F is to the right of N, so F has a smaller atomic size.
• 3d: In the same period (Period 5), atomic size decreases from left to right. Sr is to the right of Rb, so Sr has a smaller atomic size.

Answer:

2.
a) Ca
b) Ga
c) As
d) Rb
3.
a) Mn
b) Si
c) F
d) Sr