Chemical bonding

Front

Why do atoms react?

Back

Atoms (except noble gases in Group 18) react as they do not have fully filled valence shell and they want to achieve fully filled valence shell with stable noble gas electronic configuration

Front

What is ionic bonding?

Back

Transfer of electrons from metals to non-metals

o      Metals lose electrons to form positive ions

o      Non-metals gain electrons to form negative ions

Front

What is the structure of ionic compounds?

Back

Has giant ionic lattice structure with strong electrostatic forces of attraction between oppositely-charged ions

Front

What is a covalent compound?

Back

Formed by the sharing of electrons between non-metals

Has simple molecular structure with weak intermolecular forces of attraction between molecules

Front

What is the structure of covalent compounds?

Back

Has a simple molecular structure

Front

What is the melting and boiling point of ionic compounds?

Back

High melting and boiling points

·       Strong electrostatic forces of attraction

·       between oppositely-charged ions

·       Large amount of energy required to overcome these forces

Front

What is the melting and boiling point of covalent compounds?

Back

Low melting and boiling points

·       Weak intermolecular forces between molecules

·       Little amount of energy required to overcome these forces

Front

What is the physical state of ionic compounds at room temperature?

Back

mostly solids

Front

What is the physical state of covalent compounds at room temperature?

Back

mostly liquids or gases

Front

What is the physical state of metallic compounds at room temperature?

Back

mostly solids