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Which of the following represents the correct electron configuration for an aluminum (Al) atom?
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10. Periodic Properties of the Elements
The Electron Configuration
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How many electron shells are present in a neutral rubidium (Rb) atom?
A
5
B
7
C
4
D
6
Guida verificata passo dopo passo1
Identify the atomic number of rubidium (Rb) from the periodic table, which tells you the number of protons and electrons in a neutral atom.
Determine the period (row) in the periodic table where rubidium is located, as the period number corresponds to the number of electron shells in the atom.
Recall that each period in the periodic table represents the filling of a new electron shell around the nucleus.
Since rubidium is in period 5, it means it has 5 electron shells occupied by electrons.
Conclude that a neutral rubidium atom has 5 electron shells.
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