Ionization Energy Trends in the Periodic Table

The video tutorial explains ionization energy, the energy needed to remove an electron from a neutral atom, and its trends across the periodic table. It introduces ions, cations, and anions, and discusses how ionization energy varies with atomic size and position in the periodic table. The tutorial highlights that elements on the left side of the table have low ionization energy, while noble gases have high ionization energy. It also explains how ionization energy decreases down a group due to increased atomic size.

What is ionization energy?

• The energy required to remove an electron from a neutral atom

• The energy required to add an electron to an atom

• The energy required to split an atom into ions

• The energy required to form a covalent bond

What is a cation?

• An ion with a negative charge

• An ion with a positive charge

• An ion with equal protons and electrons

• A neutral atom

Which group of elements has low ionization energy?

• Halogens

• Alkali metals

• Noble gases

• Transition metals

Why do noble gases have high ionization energy?

• They are highly reactive

• They have a full outer electron shell

• They have a large atomic radius

• They have a high number of protons

As you move down a group in the periodic table, what happens to ionization energy?

• It fluctuates randomly

• It remains constant

• It decreases

• It increases

What is the relationship between atomic size and ionization energy?

• Larger atoms have higher ionization energy

• Atomic size does not affect ionization energy

• Smaller atoms have lower ionization energy

• Larger atoms have lower ionization energy

Which element has a higher ionization energy, helium or lithium?

• Helium

• Lithium

• They have the same ionization energy

• It depends on the temperature

What happens to ionization energy as you move from left to right across a period?

• It first increases then decreases

• It increases

• It remains constant

• It decreases

Why is it easier to remove an electron from sodium than from neon?

• Neon is more reactive

• Sodium is a noble gas

• Neon has a full outer shell

• Sodium has a larger atomic radius

What is the significance of the periodic table in understanding ionization energy?

• It reveals patterns in ionization energy

• It lists elements in alphabetical order

• It shows the atomic mass of elements

• It helps predict chemical reactions