select the correct answer. this periodic table entry is for the element neon. how many neutrons does a…

select the correct answer. this periodic table entry is for the element neon. how many neutrons does a typical neon atom have? 10 ne 20.18 a. 5 b. 10 c. 20 d. 30

select the correct answer. this periodic table entry is for the element neon. how many neutrons does a typical neon atom have? 10 ne 20.18 a. 5 b. 10 c. 20 d. 30

Answer

Answer:

B. 10

Explanation:

Step1: Identify atomic number and mass number

The atomic number of neon (Ne) is 10 (top - left number), and the average atomic mass is 20.18. For a typical atom, we consider the most common isotope. The mass number of the most common neon isotope is close to the average atomic mass rounded to the nearest whole number, which is 20.

Step2: Use the mass - number formula

The mass number (A) = number of protons (p) + number of neutrons (n). The atomic number (Z) is equal to the number of protons. So, n=A - p. Since Z = p = 10 and A = 20, then n=20 - 10 = 10.