Question

question 37 (2 points)
how many electrons are in the highest occupied energy level of a neutral strontium atom?
blank 1:

Explanation:

Step1: Determine the atomic number of strontium

The atomic number of strontium (Sr) is 38. A neutral atom has the number of electrons equal to the atomic number. So, a neutral Sr atom has 38 electrons.

Step2: Write the electron - configuration

The electron - configuration of Sr is \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{2}\).

Step3: Identify the highest occupied energy level

The highest occupied energy level is the 5th energy level (\(n = 5\)). In the electron - configuration of Sr, the electrons in the \(5s\) sub - shell (\(5s^{2}\)) are in the highest occupied energy level.

Answer:

2