Reactivity

The video explains the concept of reactivity in substances, focusing on how the number and arrangement of electrons in an atom influence its reactivity. Atoms strive for stability by having a full outer shell of electrons. Those with one or two electrons in their outer shell, or those missing one or two, tend to gain or lose electrons easily, making them highly reactive.

What is the tendency of a substance to undergo chemical reactions called?

• Stability

• Reactivity

• Inactivity

• Conductivity

How is the reactivity of elements related to their atomic structure?

• It depends on the number of protons.

• It is related to the number and arrangement of electrons.

• It is determined by the atomic mass.

• It is influenced by the number of neutrons.

Why do atoms with nearly full or nearly empty outer electron shells tend to be highly reactive?

• They are larger in size.

• They have a high atomic number.

• They can easily lose or gain electrons.

• They have a stable nucleus.

What do atoms need to achieve stability?

• A balanced number of neutrons

• A low atomic mass

• A high number of protons

• A full outer shell of electrons

Which type of atoms are more likely to lose or gain electrons readily?

• Atoms with one or two outer electrons

• Atoms with a balanced number of neutrons

• Atoms with a full outer shell

• Atoms with a high atomic mass