Periodicity

Question 1

Moving across a row on the periodic table, nuclear charge ____________.

Answer 1

Increases

Question 2

Going across a row on the PT, nuclear charge increases, which explains why radius ___________ and ionization energy increases.

Answer 2

Decreases

Question 3

Going across a row on the PT, nuclear charge increases, which explains why radius decreases and ionization energy ___________.

Answer 3

Increases

Question 4

Going across a row on the PT, nuclear charge increases, which explains why ionization energy increases and electronegativity _____________.

Answer 4

Increases

Question 5

Elements in the same ___________ have similar chemical and physical properties.

Answer 5

Group

Question 6

Metals are found to the _________ of the metalloids and nonmetals are found to the _________ of metalloids.

Answer 6

Left; right

Question 7

Cations are __________ than their corresponding atoms as electrons _______________ the nucleus have been removed.

Answer 7

Smaller; further from

Question 8

Anions are __________ than their corresponding atoms because adding electrons increases ______________.

Answer 8

Larger; electron repulsion

Question 9

Most electronegative element on the PT.

Answer 9

Fluorine

Question 10

Reason noble gases have greatest ionization energy in their row.

Answer 10

Largest nuclear charge

Question 11

Ionization energy is always a ____________ number because breaking attractions is always _______________.

Answer 11

Positive; endothermic

Question 12

Reason 1st electron affinity is a negative number

Answer 12

Forming proton-electron attraction

Question 13

Reason 2nd electron affinity is usually a positive number

Answer 13

Overcoming anion-electron repulsion