How many valence electrons does Ge (germanium) have?
A. 9
B. 8.
c. 7
F. 4
G. 3.
H 2
D. 6
E. 5
J. O
The Correct Answer and Explanation is :
The correct answer is F. 4.
Germanium (Ge) has 4 valence electrons. Here’s a detailed explanation:
Understanding Germanium’s Electron Configuration
Germanium is a chemical element with the atomic number 32. The atomic number indicates the number of protons in the nucleus, and for a neutral atom, it also equals the number of electrons.
The electron configuration of germanium is:
[ 1s^2 2s^2 2p^6 3s^2 3p^6 3d^{10} 4s^2 4p^2 ]
In this configuration:
- The electrons are distributed across four main energy levels (n = 1 to 4).
- The outermost (valence) shell is the 4th energy level, which includes the ( 4s^2 ) and ( 4p^2 ) subshells.
Valence Electrons
Valence electrons are the electrons in the outermost energy level of an atom. These are responsible for chemical bonding and reactivity.
For germanium:
- The 4th energy level is the outermost shell.
- It has ( 4s^2 ) (2 electrons) and ( 4p^2 ) (2 electrons), making a total of 4 valence electrons.
Chemical Behavior
Germanium is a metalloid, meaning it has properties of both metals and nonmetals. Its 4 valence electrons make it chemically similar to silicon (Si) in Group 14 (IVA) of the periodic table. These electrons enable germanium to form covalent bonds by sharing electrons with other atoms.
Key Takeaway
Understanding the electron configuration clarifies why germanium has 4 valence electrons. These electrons play a crucial role in determining its chemical behavior, including its ability to form semiconductors, a property extensively utilized in electronics.