Electron Configuration and Ion Charges

The video tutorial introduces valence electrons and their role in determining the stability of elements, particularly focusing on noble gases. It explains electron configurations, using sodium and chlorine as examples, and discusses how these elements achieve stability by forming ions through electron transfer. The concept of ions is defined, highlighting the imbalance of protons and electrons that results in a charge.

What is the primary goal of most elements on the periodic table regarding their electron configuration?

• To have no electrons in their outer shell

• To achieve a noble gas-like electron configuration

• To have a single electron in their outer shell

• To have an equal number of protons and electrons

Which noble gas configuration does sodium aim to achieve by losing an electron?

• Krypton

• Neon

• Helium

• Argon

What is the electron configuration of chlorine when it gains an electron?

• Same as Krypton

• Same as Helium

• Same as Argon

• Same as Neon

What happens to sodium when it loses an electron in a reaction with chlorine?

• It remains neutral

• It becomes a noble gas

• It gains a positive charge

• It gains a negative charge

What is formed when an atom gains or loses an electron?

• A compound

• A molecule

• An ion

• A proton

Why does chlorine prefer to gain an electron rather than remain neutral?

• To become a metal

• To lose its protons

• To achieve an argon-like configuration

• To achieve a helium-like configuration

What charge does an electron carry?

• Variable

• Positive

• Negative

• Neutral

What is the charge of a proton?

• Negative

• Positive

• Neutral

• Variable

What is the term for an atom with an unequal number of protons and electrons?

• Compound

• Isotope

• Ion

• Molecule

What is the charge of a chlorine nucleus?

• Positive 18

• Positive 17

• Negative 17

• Neutral