Question

match the number of neutrons to the isotope. drag the items on the left to the correct location on the right. be⁴₉ f⁹₁₉ ne¹⁰₂₀ o⁸₁₆ li³⁷

Explanation:

Step1: Recall neutron count formula

Number of neutrons = Mass number - Atomic number, where mass number is the top value, atomic number is the bottom value of the isotope notation.

Step2: Calculate for $_4^9\text{Be}$

$9 - 4 = 5$

Step3: Calculate for $_9^{19}\text{F}$

$19 - 9 = 10$

Step4: Calculate for $_{10}^{20}\text{Ne}$

$20 - 10 = 10$

Step5: Calculate for $_8^{16}\text{O}$

$16 - 8 = 8$

Step6: Calculate for $_3^7\text{Li}$

$7 - 3 = 4$

Answer:

• $_4^9\text{Be}$ → 5
• $_9^{19}\text{F}$ → 10
• $_{10}^{20}\text{Ne}$ → 10
• $_8^{16}\text{O}$ → 8
• $_3^7\text{Li}$ → 4