Intro to Biochemistry

Agenda

• Bonding
• Matter

Bonding

• Ionic bonds
• Covalent bonds

Electrons are SHARED in a covalent bond.

An ionic bond involves the transfer of one or more electrons from one atom to another.

An ionic compound is neutral and is made up of positive and negative ions.

The attractive force between oppositely charged particles is called electrostatic force.

It is the valence electron(s) that is transferred to form the ions.

Important Definitions

• Cation = positively charged ion
• Anion = negatively charged ion

Objectives

• Understand ionic bonding
• Be able to explain the make-up of an atom

All living things are made of matter.

EVERYTHING is made of matter.

Anything that occupies space and has mass is matter.

Matter is composed of chemical substances.

An element cannot be broken down further into other substances. They are arranged on the periodic table.

An atom is the smallest particle of an element that still characterizes that element.

At the center of an atom is the nucleus, which contains protons and neutrons.

Untitled Slide

• Protons are positively charged
• Neutrons are neutral

Negatively charged electrons form a cloud around the nucleus.

Electrons are located at discrete energy levels.