Question

1. represent the following atoms using symbolic notation:

nitrogen – 15 \t\t\t\t argon \t\t\t\t potassium - 41

Explanation:

Step1: Recall Symbolic Notation

Symbolic notation for an atom is \( _Z^A X \), where \( A \) is mass number, \( Z \) is atomic number, \( X \) is element symbol.

Step2: Nitrogen - 15

Nitrogen (N) has \( Z = 7 \), mass number \( A = 15 \). So notation: \( _7^{15}\text{N} \).

Step3: Argon (Assume most common isotope, Ar - 40)

Argon (Ar) has \( Z = 18 \), common \( A = 40 \). Notation: \( _{18}^{40}\text{Ar} \). If no mass given, use most stable isotope.

Step4: Potassium - 41

Potassium (K) has \( Z = 19 \), \( A = 41 \). Notation: \( _{19}^{41}\text{K} \).

Answer:

Nitrogen - 15: \( \boldsymbol{_7^{15}\text{N}} \)
Argon (most common isotope): \( \boldsymbol{_{18}^{40}\text{Ar}} \)
Potassium - 41: \( \boldsymbol{_{19}^{41}\text{K}} \)