객관식
Which of the following element symbols correctly represents an element with atomic number between 1 and 36?
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2. Atoms & Elements
Periodic Table: Element Symbols
객관식
Which of the following element symbols corresponds to the element with atomic number 12?
A
Mg
B
Mn
C
Na
D
Al
검증된 단계별 안내1
Understand that the atomic number of an element represents the number of protons in its nucleus and uniquely identifies the element.
Recall or refer to the periodic table to find the element with atomic number 12.
Locate the element with atomic number 12, which is in the second group of the periodic table and is an alkaline earth metal.
Identify the symbol of this element, which is 'Mg' for magnesium.
Confirm that the other options (Mn, Na, Al) correspond to different atomic numbers: Mn (25), Na (11), and Al (13).
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