Question

sun spectrum data. table with elements h, he, ca, li, na, mg, fe, ne (purple cells) and columns with x marks (e.g., h/he have x in one column, ca in another, ne/fe/mg/na/li in a third). spectral chart above with vertical lines labeled ne, fe, mg, na, li, ca, he, h, sun (wavelength axis 400–700).

Explanation:

To determine the elements present in the Sun's spectrum, we analyze the "Sun Spectrum Data" table:

Step 1: Identify "Present" (first row)

• H: Marked with × → Present.
• He: Marked with × → Present.

Step 2: Identify "Not Present" (second row)

• Ca: Marked with × → Not Present (wait, no—wait, the second row is "Not Present"? Wait, the table has columns: Element, then "Present" (first sub - row), "Not Present" (second sub - row), and a third sub - row? Wait, re - examining:

Wait, the table structure:

• Columns: Element (H, He, Ca, Li, Na, Mg, Fe, Ne)
• Rows:
• First row (labeled "Present"): H (×), He (×), others (blank) → So H and He are present.
• Second row (labeled "Not Present"): Ca (×), others (blank) → Ca is not present.
• Third row: Ne (×), Fe (×), Mg (×), Na (×), Li (×) → These are present (since they have ×, maybe this row is "Present" for these? Wait, maybe the table has three rows: two for "Present" (different categories?) and one for... Wait, the key is the × marks. Let's list each element:

• H: × in first "Present" row → Present.
• He: × in first "Present" row → Present.
• Ca: × in second "Not Present" row → Not Present.
• Li: × in third row → Present (assuming third row is "Present" for these).
• Na: × in third row → Present.
• Mg: × in third row → Present.
• Fe: × in third row → Present.
• Ne: × in third row → Present.

But if we focus on the first two rows (maybe "Present" and "Not Present" as two states), then:

• Present: H, He, Li, Na, Mg, Fe, Ne (from third row ×, and first row H, He ×).
• Not Present: Ca (from second row ×).

If the question is "Which elements are present in the Sun's spectrum?", the answer includes H, He, Li, Na, Mg, Fe, Ne (and Ca is not present).

But if we take the first "Present" row (top - most present row) and the third row (another present row), the elements with × are H, He, Li, Na, Mg, Fe, Ne. Ca has × in "Not Present" row, so not present.

Answer:

Elements present in the Sun’s spectrum (marked with ×) are: H, He, Li, Na, Mg, Fe, Ne. Element not present: Ca.

(If focusing on the first "Present" row: H, He; and third row: Li, Na, Mg, Fe, Ne. Ca is not present.)