Problem: How many valence electrons does an atom of Al possessA) 1B) 2C) 5D) 3E) 8

FREE Expert Solution

To determine the number of valence electrons in aluminum (Al) atom, let’s first write its electron configuration.

Ground-state means that aluminum is in its lowest energy form (not in excited state). Carbon also has no charge (neutral element) which means that no electrons are removed or added in the atom.

Neutral element:       Atomic number = # protons = # of electrons

Recall:

s orbital  can hold a maximum of 2 electrons

p orbitals  can hold a maximum of 6 electrons

d orbitals → can hold a maximum of 10 electrons

f orbitals → can hold a maximum of 14 electrons


From the periodic table, we can see that Al is in Period 3, Group 3A, and p-block.

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Problem Details

How many valence electrons does an atom of Al possess

A) 1

B) 2

C) 5

D) 3

E) 8

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