The atomic number of an element is 29. what is the electron configuration of this element? a) 1s2,2s2,2p6,3s2,3p6,3d9,4s2 b) 1s2,2s2,2p6,3s2,3p6,4s1,4d10 c) 1s2,2s2,2p6,3s2,3p6,4s1,3d10 d) 1s2,2s2,2p6,3s2,3p6,4s1,3d9, 4p^1

Option (b) is the correct answer.

Explanation:

According to Afbau's principle, an electron enters the orbital with lowest energy first and subsequent electrons are fed in the order of increasing energies.

Copper is the element which has atomic number 29. It is a transition metal and atomic number of an atom determines the number of electrons present in an atom.

So, the stable electronic configuration of copper is as follows.

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answer: i have one answer

acids are substances that ionize (break off) in an aqueous solution to produce hydrogen (h+) ions

explanation:

hope this and sorry i could only come up with one answer!