use the periodic table and what you know about mass numbers to complete each statement. u - 238 has protons…

use the periodic table and what you know about mass numbers to complete each statement. u - 238 has protons and 146 neutrons. a particular isotope of plutonium has 94 protons, neutrons, and a mass number of 241. thorium - has 90 protons and 137 neutrons. done

use the periodic table and what you know about mass numbers to complete each statement. u - 238 has protons and 146 neutrons. a particular isotope of plutonium has 94 protons, neutrons, and a mass number of 241. thorium - has 90 protons and 137 neutrons. done

Answer

Explanation:

Step1: Recall atomic number concept

The atomic number of an element is equal to the number of protons. Uranium (U) has an atomic number of 92. So U - 238 has 92 protons.

Step2: Calculate neutrons for plutonium

The mass number is the sum of protons and neutrons. For plutonium with 94 protons and a mass number of 241, the number of neutrons is $241 - 94=147$.

Step3: Calculate mass number for thorium

The mass number of an isotope is the sum of protons and neutrons. For thorium with 90 protons and 137 neutrons, the mass number is $90 + 137 = 227$.

Answer:

92 147 227