Question

isotope #3

• element symbol
• nuclear symbol
• atomic number
• mass number
• protons: 7
• neutrons: 8
• electrons

Explanation:

Step1: Determine element symbol

The number of protons determines the element. Since there are 7 protons, the element is nitrogen with symbol N.

Step2: Write nuclear symbol

The nuclear symbol is written as $_{Z}^{A}X$, where $Z$ is the atomic number (number of protons) and $A$ is the mass - number (sum of protons and neutrons). Here, $Z = 7$, $A=7 + 8=15$, and $X = N$. So the nuclear symbol is $_{7}^{15}N$.

Step3: Find atomic number

The atomic number is equal to the number of protons. So the atomic number is 7.

Step4: Calculate mass number

The mass number is the sum of protons and neutrons. So $7+8 = 15$.

Step5: Determine number of electrons

For a neutral atom, the number of electrons is equal to the number of protons. So the number of electrons is 7.

Answer:

Element Symbol: N
Nuclear Symbol: $_{7}^{15}N$
Atomic Number: 7
Mass Number: 15
Electrons: 7