Why are the lines of ionized calcium in the spectrum of the Sun stronger than the lines of hydrogen

Why are the lines of ionized calcium in the spectrum of the Sun stronger than the lines of hydrogen, although the calcium on the Sun is incomparably less?

Due to the relatively low temperature of the solar photosphere, there is a small number of excited hydrogen atoms with an electron at the second level, from which absorption occurs in the lines of the visible region of the spectrum. In calcium, the excitation energy of the corresponding levels is much lower.

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