WJEC Electronic Configuration

Which element has an electron configuration of 2.8.6?

• Oxygen (O)

• Chlorine (Cl)

• Sulfur (S)

• Phosphorus (P)

What is the maximum number of electrons that can occupy the second energy level?

• 2

• 4

• 6

• 8

What does the notation '2.8.2' in electron configuration indicate?

• It indicates that there are 2 electrons in the first energy level, 8 in the second, and 2 in the third energy level.

• It indicates that there are 2 electrons in the first energy level, 6 in the second, and 2 in the third energy level.

• It indicates that there are 2 electrons in the first energy level, 8 in the second, and 8 in the third energy level.

• It indicates that there are 2 electrons in the first energy level, 4 in the second, and 2 in the third energy level.

What is the maximum number of electrons that can occupy the first energy level?

• 1

• 2

• 3

• 4

What are valence electrons?

• Electrons that are found in the nucleus of an atom.

• Electrons that are involved in chemical bonding and are in the outermost shell of an atom.

• Electrons that are always positively charged.

• Electrons that are responsible for the mass of an atom.

How do you determine the electron configuration of an element?

• By using the periodic table to find the element's atomic number.

• By following the Aufbau principle, Hund's rule, and the Pauli exclusion principle.

• By calculating the element's mass number and atomic weight.

• By determining the element's ionization energy and electronegativity.

How does electron configuration relate to an element's reactivity?

• Electron configuration has no effect on reactivity.

• Electron configuration determines the number of valence electrons, which influences an element's reactivity and ability to form bonds.

• Electron configuration only affects the mass of an element.

• Electron configuration is unrelated to chemical bonding.

What is the electron configuration of magnesium?

• 2.8.1

• 2.8.2

• 2.8.3

• 2.7.2

What does the notation '2.8.8.1' in electron configuration represent?

• 2 electrons in the first energy level, 8 in the second, 8 in the third, and 1 in the fourth energy level.

• 2 electrons in the first energy level, 8 in the second, 6 in the third, and 2 in the fourth energy level.

• 2 electrons in the first energy level, 6 in the second, 8 in the third, and 2 in the fourth energy level.

• 2 electrons in the first energy level, 8 in the second, 8 in the third, and 2 in the fourth energy level.

What is the electron configuration of potassium?

• 2.8.8.2

• 2.8.1

• 2.8.8.1

• 2.8.8.0