Question

What is the atomic number of an element with the electron configuration 1s22s22p63s23p63d104s24p5?

how do i find it

Answer 1

To find the atomic number of an element from its electron configuration, you can simply count the total number of electrons in that configuration. The atomic number of an element represents the number of electrons it has.

In your provided electron configuration, you have:

1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁵

Now, add up the number of electrons in each orbital:

2 (from 1s²) + 2 (from 2s²) + 6 (from 2p⁶) + 2 (from 3s²) + 6 (from 3p⁶) + 10 (from 3d¹⁰) + 2 (from 4s²) + 5 (from 4p⁵) = 35 electrons.

So, the atomic number of the element with this electron configuration is 35. You can find this element on the periodic table by looking for the element with atomic number 35, which is bromine (Br).