Question

how many protons and neutrons are in an atom of yb-168?
number of protons =
number of neutrons =

Explanation:

Step1: Find atomic number of Yb

Ytterbium (Yb) has an atomic number of 70. The number of protons equals the atomic number, so number of protons = 70.

Step2: Calculate number of neutrons

The mass number of Yb - 168 is 168. Number of neutrons = mass number - atomic number = 168 - 70 = 98.

Answer:

Number of protons = 70
Number of neutrons = 98