The video tutorial explores reactivity trends in Group 1 and Group 7 elements, focusing on their electronic configurations. Group 1 elements become more reactive as you move down the group due to increased distance and electrostatic shielding, making it easier to lose an outer electron. Conversely, Group 7 elements become more reactive as you move up the group, as smaller atomic size and less shielding enhance their ability to acquire an extra electron. The tutorial explains these concepts with examples and diagrams.

What is the main focus of the lesson on reactivity trends?

• Reactivity trends in Group 1 and Group 7 elements

• The periodic table as a whole

• The reactivity of metals in general

• The electronic configuration of noble gases

Why does the reactivity of Group 1 elements increase as you move down the group?

• The number of protons decreases

• The nucleus becomes more positively charged

• The outer electron is further from the nucleus

• The outer electron is closer to the nucleus

What role does electrostatic shielding play in the reactivity of Group 1 elements?

• It makes the nucleus more positively charged

• It has no effect on reactivity

• It weakens the attraction between the nucleus and outer electron

• It strengthens the attraction between the nucleus and outer electron

How does the reactivity of Group 7 elements change as you move up the group?

• It increases

• It remains the same

• It decreases

• It fluctuates randomly

What do Group 7 elements need to do to achieve a stable electronic configuration?

• Remain unchanged

• Lose an electron

• Gain an extra electron

• Share electrons

Why is fluorine more reactive than iodine in Group 7?

• Fluorine has more protons

• Fluorine is smaller and can attract electrons more easily

• Iodine is closer to the nucleus

• Iodine has fewer electrons

What effect does the size of an atom have on its reactivity in Group 7?

• Reactivity is random

• Size has no effect

• Smaller atoms are more reactive

• Larger atoms are more reactive

How does electrostatic shielding affect the reactivity of iodine compared to fluorine?

• It makes iodine more reactive

• It has no effect

• It makes iodine less reactive

• It makes fluorine less reactive

What is the overall trend in reactivity for Group 1 elements?

• Reactivity increases down the group

• Reactivity decreases down the group

• Reactivity fluctuates

• Reactivity remains constant

What is the overall trend in reactivity for Group 7 elements?

• Reactivity fluctuates

• Reactivity decreases up the group

• Reactivity remains constant

• Reactivity increases up the group