Question

writing noble gas configurations
how do you simplify electron configurations using the periodic table?
noble gases the last group of elements in the periodic table have full subshells. these elements are called the noble gases.
noble gas configuration the noble gas configuration clearly shows the electrons in the outermost energy level, the valence electrons.
full electron configuration of sulfur, s: 1s²2s²2p⁶3s²3p⁴
the first 10 electrons are represented by: ne
noble gas configuration of s: ne3s²3p⁴
this shell model shows the valence electrons and core electrons in a sulfur atom.
31 apply concepts use the periodic table to write the noble gas configuration for strontium (sr).

Explanation:

Step1: Find Sr's position

Strontium (Sr) has atomic number 38. The noble - gas before Sr is krypton (Kr) which has an atomic number of 36.

Step2: Write noble - gas configuration

The noble - gas configuration starts with the symbol of the noble gas with the closest and lower atomic number. Then we add the remaining electrons in the outer - shell. The remaining number of electrons for Sr after accounting for Kr's 36 electrons is \(38 - 36=2\). These 2 electrons go into the \(5s\) orbital.

Answer:

\([Kr]5s^{2}\)