Question

for an element with 44 protons, 56 neutrons, and 40 electrons what is the isotope name
ruthenium - 45
ruthenium - 43
rythenium - 102
ruthenium - 101
ruthenium - 100
ruthenium - 44
for an element with 44 protons, 56 neutrons, and 40 electrons what is the atomic number
131
78
11
100

Explanation:

Step1: Recall atomic number definition

The atomic number is equal to the number of protons. Given 44 protons, the atomic number is 44. The element with atomic number 44 is Ruthenium.

Step2: Calculate mass - number

The mass - number of an isotope is the sum of protons and neutrons. So, mass - number = 44 (protons)+56 (neutrons)=100.

Step3: Determine isotope name

The isotope name is written as Element - Mass number. So the isotope name is Ruthenium - 100.

Answer:

For the isotope name question: Ruthenium - 100
For the atomic number question: 44 (but 44 is not among the given options for the atomic number question, indicating an error in the options provided for that part as the correct atomic number based on 44 protons is 44)