Question

the extra terrestrials who banished the imperial unit system also got ahold of our periodic table. they reorganized it as shown below, but kept same element names and symbols we are familiar with. they also kept the s, p, d and f blocks in place (but adjusted the number of orbitals in each subshell). use the et periodic table below to answer the following question.
how many unpaired electrons does a neutral atom of in have?

Explanation:

Step1: Find atomic number of In

From the table, In has atomic number 25.

Step2: Define subshell orbital counts

In this table, s-block has 2 groups (so s-subshell has 1 orbital, holds 2 e⁻), p-block has 4 groups (so p-subshell has 2 orbitals, holds 4 e⁻), d-block has 10 groups (so d-subshell has 5 orbitals, holds 10 e⁻).

Step3: Write electron configuration

Fill subshells in order: $1s^2 2s^2 2p^4 3s^2 3p^4 4s^2 3d^{10} 4p^1$

Step4: Count unpaired electrons

The $4p$ subshell has 1 unpaired electron (only 1 e⁻ in 2 p-orbitals).

Answer:

1