Exploring Periodic Trends in Chemistry

Which of the following properties is NOT discussed in the video?

• Atomic radius

• Electronegativity

• Ionization energy

• Melting point

What does the effective nuclear charge influence?

• The number of neutrons in the nucleus

• The attraction of the nucleus for the electrons

• The atomic mass of the element

• The number of protons in the nucleus

As you move across a period, what happens to the atomic radius?

• It increases

• It decreases

• It fluctuates

• It remains the same

Why does ionization energy generally increase across a period?

• Because the number of energy levels increases

• Because the atomic radius increases

• Because the effective nuclear charge increases

• Because the effective nuclear charge decreases

Which group transition shows an exception in ionization energy due to Hund's rule?

• Groups 2A to 3A

• Groups 5A to 6A

• Groups 1A to 2A

• Groups 4A to 5A

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What is metallic character defined as?

• The ability to attract electrons in a bond

• The readiness of an atom to lose an electron

• The size of an atom

• The energy required to remove an electron

Why do noble gases have no electronegativity?

• Because they have a complete valence level

• Because they have a high atomic radius

• Because they have a low ionization energy

• Because they are metals

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What happens to the ionic radius of metals when they form ions?

• It remains the same

• It increases

• It fluctuates

• It decreases

As you move down the halogen group, what happens to the reactivity of nonmetals?

• It remains the same

• It decreases

• It increases

• It fluctuates

Why do alkali metals become more reactive as you move down the group?

• Because their ionization energy increases

• Because they gain electrons more easily

• Because they lose electrons more easily

• Because their atomic radius decreases

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