Scelta multipla
Which of the following best describes how electrons in the same atom can differ from each other?
122
views
10. Periodic Properties of the Elements
Valence Electrons of Elements
Scelta multipla
How many valence electrons does potassium (K) have?
A
2
B
1
C
8
D
7
Guida verificata passo dopo passo1
Identify the element in question, which is potassium (K).
Recall that valence electrons are the electrons in the outermost shell of an atom.
Determine the electron configuration of potassium (K), which has an atomic number of 19. The configuration is \$1s^2 2s^2 2p^6 3s^2 3p^6 4s^1$.
Note that the outermost shell for potassium is the 4th shell, which contains only one electron in the 4s orbital.
Conclude that potassium has 1 valence electron because it has one electron in its outermost shell.
Video correlati
Pratica correlata
