question 2. the letter of an element symbol is a letter , while the letter (if there is one) is a letter.
question 2. the letter of an element symbol is a letter , while the letter (if there is one) is a letter.
Answer
Brief Explanations:
In chemical element symbols, the first letter is always capitalized, and if there is a second letter, it is always lowercase.
Answer:
first; capital; second; lowercase