Question

PLS HELP

1. How many valence electrons are in an atom with the electron configuration in example A?


Example A: 1s22s22p63s23p64s24p2


22

2

4

6

2. The d subshell can hold up to 10 electrons in an atom.

True
False

3. Fill in the blank- The element argon has _____ valence electrons. (Input only a whole number, such as 7.)

Answer 1

1. 22

2. False, the d subshell can only hold 6 electrons

3. 8 because the element is a noble gas

Answer 2

Answer 1: there are 4 valence electrons in the Example A

Answer 2: The d subshell can hold up 10 electron: True

Answer 3: The element argon has 8 valence electrons.

Step-by-step explanation:

Answer 1: The example A has four shells, and in the forth shell, it holds a total of 2 + 2 = 4 , so it has 4 valence electrons.

Answer 2: As you can see in the image, the d subshell has 5 different areas where you likely find a pair of electrons. In each area you can find until 2 electrons, so 5 x 2 = 10 electrons can be hold up in the d subshell.

Answer 3: Noble gases like argon have 8 valence electrons and its electron configuration is [ N e ] 3 s 2 3 p 6