Multiple Choice
Atoms of which element contain 25 protons?
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4. Atoms and Elements
Subatomic Particles (Simplified)
Multiple Choice
Which neutral element has 35 electrons?
A
Krypton (Kr)
B
Chlorine (Cl)
C
Rubidium (Rb)
D
Bromine (Br)
Verified step by step guidance1
Recall that a neutral atom has an equal number of protons and electrons.
Identify the atomic number of each element, which corresponds to the number of protons (and electrons in a neutral atom).
Look up the atomic numbers: Krypton (Kr) is 36, Chlorine (Cl) is 17, Rubidium (Rb) is 37, and Bromine (Br) is 35.
Since the element with 35 electrons must have an atomic number of 35, match this to the element Bromine (Br).
Conclude that Bromine (Br) is the neutral element with 35 electrons.
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