Periodic Table and Atomic Properties

This video tutorial explores periodic trends on the periodic table, explaining how properties of chemical elements change across periods and down groups. It covers the structure of the periodic table, including groups, periods, and blocks, and discusses key concepts such as ionization energy, electron affinity, and electronegativity. The video also highlights how atomic radius affects these properties, providing insights into the behavior of metals and non-metals.

What does the atomic number of an element represent?

• The number of neutrons in the nucleus

• The number of protons in the nucleus

• The number of electrons in the outer shell

• The relative atomic mass

Which group of elements is known for having one valence electron and being highly reactive?

• Alkaline earth metals

• Alkali metals

• Noble gases

• Transition metals

What is a characteristic of noble gases?

• They have partially filled d orbitals

• They have a full octet of electrons

• They are metals

• They are highly reactive

What do elements in the same period have in common?

• Same chemical properties

• Same atomic number

• Same number of valence electrons

• Same number of electron shells

Which block of the periodic table contains elements with the highest energy electrons in p orbitals?

• d block

• f block

• p block

• s block

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

• It increases

• It remains constant

• It decreases

• It fluctuates randomly

Why does ionization energy decrease down a group?

• The atomic radius decreases

• The number of electron shells increases

• The nuclear charge decreases

• The number of valence electrons decreases

What is electron affinity?

• The ability of an atom to attract electrons in a bond

• The energy change when an atom gains an electron

• The number of electrons in the outer shell

• The energy required to remove an electron

How does electronegativity change across a period?

• It remains constant

• It fluctuates randomly

• It decreases

• It increases

Which element is more electronegative, oxygen or hydrogen?

• Oxygen

• Hydrogen

• It depends on the compound

• They have the same electronegativity