객관식
Periodic Table: Element Symbols — What is the chemical symbol for the element sodium?
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4. Atoms and Elements
Periodic Table: Element Symbols
객관식
Which element has 4 protons in its nucleus?
A
Carbon (C)
B
Boron (B)
C
Beryllium (Be)
D
Lithium (Li)
검증된 단계별 안내1
Recall that the number of protons in the nucleus of an atom defines the element's atomic number.
Identify the atomic numbers of the given elements: Carbon (C) has 6 protons, Boron (B) has 5 protons, Beryllium (Be) has 4 protons, and Lithium (Li) has 3 protons.
Match the atomic number to the number of protons: since the question asks for the element with 4 protons, look for the element with atomic number 4.
Recognize that Beryllium (Be) has an atomic number of 4, meaning it has 4 protons in its nucleus.
Conclude that the element with 4 protons is Beryllium (Be).
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