What Are Valence Electrons And How To Find Them?

The video tutorial explains the significance of valence electrons in determining chemical properties and bonding. It covers the periodic table's structure, focusing on main group and transition elements. The tutorial delves into quantum states and electron configurations, highlighting the complexity of predicting valence electrons in transition elements due to their energy level behaviors.

What is the primary role of valence electrons in chemical reactions?

• They indicate the number of possible bonds.

• They determine the atomic mass.

• They define the element's density.

• They are responsible for the color of the element.

Which of the following is true about transition elements?

• They have a fixed number of valence electrons.

• They are poor conductors of electricity.

• They are malleable and ductile.

• Their valence electrons can be determined by group number.

Why is it difficult to predict the number of valence electrons in transition elements?

• Due to their fixed electron configuration.

• Due to the minuscule energy differences between shells.

• Because they have no valence electrons.

• Because they are non-metals.

What is a quantum number?

• A shell and its sub-shells.

• A measure of atomic mass.

• A unit of energy.

• A type of chemical bond.

Which orbital can hold up to 10 electrons?

• P orbital

• F orbital

• S orbital

• D orbital