Question

multiple choice 1 point
what is the ground state electron configuration for arsenic?
1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶
1s²2s²2p⁶3s²3p⁶4s²4p³
1s²2s²2p⁶3s²3p⁶4s²4p³4d¹⁰
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p³
6
multiple choice 1 point
which particles are represented by the dots in lewis valence e - dot structures?
all electrons
core electrons
valence electrons
protons

Explanation:

Step1: Determine the atomic number of arsenic

Arsenic has an atomic number of 33.

Step2: Write the electron configuration

According to the Aufbau principle, electrons fill orbitals in order of increasing energy. The electron configuration for arsenic is \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{3}\).

Step3: Analyze the Lewis valence e - dot structures

In Lewis valence e - dot structures, the dots represent valence electrons.

Answer:

For the first question: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{3}\) (the fourth option).
For the second question: valence electrons.