Understanding Atomic Stability and Ions

The video explains how atoms, like humans, strive for stability. It uses sodium and chlorine as examples to illustrate how atoms achieve stability by losing or gaining electrons. Sodium loses an electron to form a positively charged ion, while chlorine gains an electron to form a negatively charged ion. The video also discusses the concept of neutral atoms having equal numbers of protons and electrons, and how ions form when this balance is disrupted.

What is the analogy used to describe how atoms behave?

• Atoms behave like machines.

• Atoms behave like humans seeking stability.

• Atoms behave like plants growing towards light.

• Atoms behave like animals hunting for food.

How many electrons does a sodium atom have in its outer shell?

• Two electrons

• Eight electrons

• One electron

• Three electrons

What happens to a sodium atom when it loses an electron?

• It becomes a sodium atom with more electrons.

• It becomes a neutral sodium atom.

• It becomes a sodium ion with a positive charge.

• It becomes a sodium ion with a negative charge.

Why are atoms in the universe generally neutral?

• Because they have more electrons than protons.

• Because they have more protons than electrons.

• Because they have equal numbers of protons and electrons.

• Because they have no protons or electrons.

What is the charge of a sodium ion after losing an electron?

• Positive two

• Zero

• Positive one

• Negative one

How does a chlorine atom achieve a stable outer shell?

• By gaining a proton

• By gaining an electron

• By losing a proton

• By losing an electron

What is the charge of a chloride ion?

• Positive one

• Positive two

• Negative one

• Zero

How many electrons does a chloride ion have?

• Sixteen electrons

• Eighteen electrons

• Seventeen electrons

• Nineteen electrons

What remains unchanged in an atom when it becomes an ion?

• The number of electrons

• The number of protons

• The overall charge

• The number of neutrons

What is the main reason atoms gain or lose electrons?

• To increase their size

• To become more reactive

• To change their identity

• To achieve a stable outer shell