Chemistry

Question Analysis
This question assesses the student's ability to write the shorthand notation for an element, using the noble gas notation.

Key Concept Explanation
Shorthand notation uses the symbol of a noble gas (in square brackets) to represent the filled inner electron configuration, followed by the valence shell configuration.

Step-by-step Solution
1. Identify the noble gas before calcium: Argon (Ar, atomic number 18).
2. Write the shorthand notation: [Ar] for the inner electrons.
3. Dete...