Argon, neon, and xenon are examples of _________. A) halogens B) metalloids C) noble gases D) alkali metals
2 answers:
Answer:
Argon, neon and xenon are examples of noble gases.
C is correct option.
Explanation:
According to electronic configuration
Argon:
The atomic number of argon is 18.
The electronic configuration of argon
Ar= 2,8,8
Neon:
The atomic number of argon is 10.
The electronic configuration of argon
Ar= 2,8
Xenon:
The atomic number of argon is 54.
The electronic configuration of argon
Ar= 2,8,18,18,8
Argon, neon and xenon are examples of noble gases because the last shell is completely filled and they does not participate in any reaction so, these atoms are called noble gasses.
Hence, Argon, neon and xenon are examples of noble gases.
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Answer:
w = 0.943 rad / s
Explanation:
For this problem we can use the law of conservation of angular momentum
Starting point. With the mouse in the center
L₀ = I w₀
Where The moment of inertia (I) of a rod that rotates at one end is
I = 1/3 M L²
Final point. When the mouse is at the end of the rod
= I w + m L² w
As the system is formed by the rod and the mouse, the forces during the movement are internal, therefore the angular momentum is conserved
L₀ = L_{f}
I w₀ = (I + m L²) w
w = I / I + m L²) w₀
We substitute the moment of inertia
w = 1/3 M L² / (1/3 M + m) L² w₀
w = 1 / 3M / (M / 3 + m) w₀
We substitute the values
w = 1/3 / (1/3 + 0.02) w₀
w = 0.943 w₀
To finish the calculation the initial angular velocity value is needed, if we assume that this value is w₀ = 1 rad / s
w = 0.943 rad / s