How Does The Periodic Table Work

The video explains the structure of the periodic table, highlighting the significance of periods and groups. It discusses electron configurations and their relation to group numbers, emphasizing trends in properties across periods and down groups. Key groups like alkali metals, halogens, and noble gases are explored, focusing on their reactivity and characteristics.

What does the group number of an element indicate about its electron configuration?

• The number of electron shells

• The number of protons

• The atomic mass

• The number of electrons in the outer shell

As you move from left to right across a period, which of the following trends is observed?

• Ionization energy decreases

• Electronegativity increases

• Atomic radius increases

• Elements become more metallic

What happens to the atomic radius as you move down a group in the periodic table?

• It fluctuates

• It increases

• It remains constant

• It decreases

Which group of elements becomes more reactive as you move down the group?

• Transition metals

• Alkali metals

• Halogens

• Noble gases

Why are noble gases considered unreactive?

• They are all metals

• They have low ionization energy

• They have a full outer shell of electrons

• They have a high atomic radius