Scelta multipla
How many unpaired electrons are present in a neutral calcium (Ca) atom?
216
views
10. Periodic Properties of the Elements
Valence Electrons of Elements
Scelta multipla
What is the total number of electrons required to completely fill the fourth main energy level (n = 4) of an atom?
A
16
B
8
C
18
D
32
Guida verificata passo dopo passo1
Recall that the total number of electrons that can fit in a main energy level (shell) is given by the formula \$2n^2$, where $n$ is the principal quantum number (the energy level).
Identify the principal quantum number for the problem, which is \(n = 4\) for the fourth main energy level.
Substitute \(n = 4\) into the formula to find the maximum number of electrons: \(2 \times (4)^2\).
Calculate the value inside the parentheses first: \((4)^2 = 16\).
Multiply by 2 to get the total number of electrons: \(2 \times 16 = 32\) electrons can fill the fourth main energy level completely.
Video correlati
Pratica correlata
