Question

question 9 0.4 pts which element has the electron - configuration- 1s² 2s² 2p⁶ 3s² 3p⁵ fluorine magnesium calcium chlorine question 10 0.4 pts which atomic orbital has the largest energy? 1p 1s 2s 3s question 11 0.4 pts how many sub - orbitals can a p orbital have around the nucleus 1 7 3 5

Explanation:

Question 9

Step1: Calculate total electrons

Add up the exponents in the electron - configuration $1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}$. So, $2 + 2+6 + 2+5=17$.

Step2: Identify element

The element with 17 electrons is chlorine.

Question 10

Step1: Recall orbital energy order

The energy of atomic orbitals increases with the principal quantum number $n$ and the angular - momentum quantum number $l$. The order of energy is $1s<2s<2p<3s<3p<4s<3d...$. The $1p$ orbital does not exist. Among $1s$, $2s$, and $3s$, the $3s$ orbital has the largest energy as it has a higher principal quantum number $n = 3$.

Question 11

Step1: Recall p - orbital properties

A p - orbital has three sub - orbitals, $p_x$, $p_y$, and $p_z$.

Answer:

Question 9: D. chlorine
Question 10: D. 3s
Question 11: C. 3