Ionic and Electron Behavior in Atoms

The video tutorial introduces ions, explaining how atoms become ions by losing or gaining electrons. It covers valence electrons, electronegativity, ionization energy, and electron affinity. The octet rule is discussed, highlighting the stability of noble gases. The Bohr model is used to illustrate ionization, and the video concludes with a summary and a preview of the next topic on carbon atom structure.

What is the primary reason an atom becomes an ion?

• To change its atomic number

• To increase its mass

• To achieve a stable electron configuration

• To become a noble gas

Which of the following best describes valence electrons?

• Electrons that are shared between atoms

• Electrons that have no charge

• Electrons in the innermost shell

• Electrons in the outermost shell involved in chemical reactions

What does a high electronegativity value indicate about an atom?

• It is a noble gas

• It has a large atomic radius

• It is likely to gain electrons

• It is likely to lose electrons

Which element in period 2 has the lowest ionization energy?

• Lithium

• Neon

• Fluorine

• Carbon

What is electron affinity?

• The energy that holds protons together

• The energy needed to split an atom

• The energy released when an atom gains an electron

• The energy required to remove an electron

According to the octet rule, how many electrons do atoms prefer in their valence shell?

• 8

• 6

• 4

• 2

Why are noble gases considered stable?

• They have a full outer shell of electrons

• They have high ionization energy

• They have low electronegativity

• They can easily gain electrons

What happens to the size of an anion compared to its neutral atom?

• It becomes unstable

• It increases

• It remains the same

• It decreases

What is the charge of a cation?

• Negative

• Positive

• Neutral

• Variable

What is the role of valence electrons in chemical reactions?

• They are directly involved in chemical activity

• They are not involved in reactions

• They stabilize the nucleus

• They determine the atomic mass