Atoms and Ions Explained - What's the difference?

This video explains the difference between atoms and ions. Atoms are neutral because they have an equal number of protons and electrons, resulting in no charge. In contrast, ions have a charge due to an imbalance between protons and electrons. The video uses sulfur as an example to illustrate these concepts, showing how sulfur can exist as both an atom and an ion. The video concludes with examples of different elements as atoms and ions, helping viewers quickly identify them based on their charge.

What is the main difference between an atom and an ion?

• Atoms are always positive, ions are always negative.

• Atoms have more protons than electrons, ions have equal numbers.

• Atoms are neutral, ions have a charge.

• Atoms have a charge, ions do not.

Why can't the number of protons in an ion change?

• Protons are not involved in chemical reactions.

• Changing protons would change the element's identity.

• Protons are heavier than electrons.

• Protons are always equal to electrons.

What does a -2 charge on sulfur indicate?

• Sulfur has two more protons than electrons.

• Sulfur has two more electrons than protons.

• Sulfur has lost two protons.

• Sulfur has gained two protons.

How can you identify an ion from its symbolic notation?

• It has no charge in the top right corner.

• It has a charge in the top right corner.

• It has a different element symbol.

• It has more protons than electrons.

Which of the following represents an atom?

• Na+

• Ca+2

• Ag+1

• U