When a Lithium Atom Is Made from a Helium Atom

question 23

Multiple Choice

When a lithium atom is made from a helium atom by adding a proton (and neutron) to the nucleus and an electron outside, the electron goes into an n = 2, ℓ=0 state rather than an n = 1, ℓ=0 state.This is an indication that electrons:

• A)obey the Pauli exclusion principle
• B)obey the minimum energy principle
• C)undergo the Zeeman effect
• D)are diffracted
• E)and protons are interchangeable

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Definitions:

Post-Natal Stage

The period following childbirth, focusing on the mother's recovery and the baby's adaptation to life outside the womb.

Embryonic

Referring to an early developmental stage in animals and plants; in humans, it covers the first eight weeks after fertilization.

Foetal

Pertaining to a fetus, the developmental stage of a vertebrate occurring in the womb before birth.

Post-Natal

Pertaining to the period immediately following birth.