Questions: When moving from left to right across a period, ionization energy is increasing? By which other trend is this caused? a) Increase of electrical conductivity b) Decrease of atomic radius c) Less electrons in the outer shell d) Decrease in atomic mass

When moving from left to right across a period, ionization energy is increasing? By which other trend is this caused?
a) Increase of electrical conductivity
b) Decrease of atomic radius
c) Less electrons in the outer shell
d) Decrease in atomic mass

Transcript text: When moving from left to right across a period, ionization energy is increasing? By which other trend is this caused? a) Increase of electrical conductivity b) Decrease of atomic radius c) Less electrons in the outer shell d) Decrease in atomic mass

Solution

Solution Steps

Step 1: Identify the trend in question

The question asks about the trend of increasing ionization energy when moving from left to right across a period.

Step 2: Understand the cause of the trend

Ionization energy increases across a period due to the increasing nuclear charge, which pulls electrons closer to the nucleus, making them harder to remove.

Step 3: Match the cause with the given options

a) Increase of electrical conductivity: Not related to ionization energy.
b) Decrease of atomic radius: Correct, as the atomic radius decreases, electrons are held more tightly.
c) Less electrons in the outer shell: Incorrect, the number of electrons in the outer shell increases across a period.
d) Decrease in atomic mass: Not directly related to ionization energy.

Step 4: Select the correct option

The correct answer is b) Decrease of atomic radius.