Which of the following has the electronic configuration ending in 4p5?

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Question: Which of the following has the electronic configuration ending in 4p5?

Options:

Correct Answer: Br

Solution:

Bromine (Br) has the atomic number 35, and its configuration ends in 4p5.

Which of the following has the electronic configuration ending in 4p5?

Which of the following has the electronic configuration ending in 4p5?

Step 1: Understand what electronic configuration means. It describes how electrons are arranged in an atom.
Step 2: Identify the notation '4p5'. This means we are looking for an element that has 5 electrons in the 'p' subshell of the 4th energy level.
Step 3: Recall the order of filling electron subshells. The 'p' subshell can hold a maximum of 6 electrons, and it is filled after the 's' subshell.
Step 4: Recognize that the '4p' subshell starts filling after the '3d' subshell is filled, which occurs after the first 18 elements.
Step 5: Count the total number of electrons needed to reach the '4p5' configuration. This means we need 35 electrons in total.
Step 6: Look up the periodic table to find the element with atomic number 35. This element is Bromine (Br).
Step 7: Confirm that Bromine's electronic configuration ends in '4p5'.

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