Question

the atomic weight of nitrogen is very near 14, indicating that most nitrogen atoms have a mass number of 14. how many neutrons does the average nitrogen atom have? a. 0 b. 7 c. 8 d. 14 e. not enough information to determine 7 nitrogen n 14.0067

Explanation:

Step1: Recall the formula for neutrons

The number of neutrons in an atom is calculated by the formula: \( \text{Number of neutrons} = \text{Mass number} - \text{Atomic number} \).

Step2: Identify atomic and mass numbers

From the periodic table snippet, the atomic number (the number above the element symbol) of nitrogen is 7. The mass number of the average nitrogen atom is given as 14 (from the atomic weight being near 14).

Step3: Calculate the number of neutrons

Using the formula, substitute the values: \( \text{Number of neutrons} = 14 - 7 = 7 \).

Answer:

B. 7