Chlorine Atom and Ion Concepts

The video tutorial covers the concepts of atoms, ions, and isotopes. It explains that atoms are neutral particles with equal numbers of protons and electrons. Ions are formed when atoms gain or lose electrons, resulting in a charge. Isotopes are variations of atoms with different numbers of neutrons, affecting their mass numbers. The video uses chlorine as an example to illustrate these concepts, showing how it can exist as an atom, ion, or isotope. The Bohr model is used to depict the atomic structure of chlorine in these different forms.

What happens to an atom when it gains or loses electrons?

• It changes its atomic number.

• It becomes an isotope.

• It becomes an ion.

• It remains neutral.

Which of the following is true about anions?

• They are neutral particles.

• They have more electrons than protons.

• They have a positive charge.

• They have more protons than electrons.

How does the mass number of an isotope differ from a regular atom?

• It is always higher.

• It is always lower.

• It can be higher or lower depending on the number of neutrons.

• It remains the same.

In the Bohr model of chlorine, how many protons are present in the nucleus?

• 35

• 18

• 17

• 21

What is the total number of electrons in a neutral chlorine atom?

• 21

• 35

• 18

• 17

How does the electron configuration change when chlorine becomes a negative ion?

• It gains one electron.

• It loses one electron.

• It loses two electrons.

• It gains two electrons.

What is the charge of a chlorine ion with 18 electrons?

• Negative

• Positive

• Neutral

• No charge

In an isotope of chlorine with a mass number of 38, how many neutrons are present?

• 38

• 21

• 18

• 17

What remains unchanged in an isotope compared to a regular atom?

• Number of neutrons

• Number of protons

• Mass number

• Electron configuration

Which shell configuration is correct for a neutral chlorine atom?

• 2, 8, 6

• 2, 8, 8

• 2, 8, 7

• 2, 7, 8