Question

problem 4a: isotopes are atoms of the same element that have different masses (like u238 & u235). this is due adding or removing neutrons. using the simulation, create two isotopes of the same element by changing the number of neutrons in an atom of that element. in the space to the right, identify your first isotope: 1. element name 2. # of protons 3. # of electrons 4. # of neutrons 5. what is the mass? problem 4b: show a 2nd isotope of your element in 4a (on the right) contact your science teacher if you have questions

Explanation:

Step1: Recall isotope concept

Isotopes of an element have same number of protons and electrons but different number of neutrons. For carbon, atomic number is 6, so number of protons and electrons is 6. Mass number = number of protons+number of neutrons.

Step2: Identify first isotope (Carbon - 12)

Element name: Carbon

of protons: 6

of electrons: 6

of neutrons: 6 (since mass = 12 and protons = 6, 12 - 6=6)

Mass: 12

Step3: Create second isotope (Carbon - 13)

Element name: Carbon

of protons: 6

of electrons: 6

of neutrons: 7 (since we change number of neutrons and mass = protons+neutrons, 6 + 7=13)

Mass: 13

Answer:

Problem 4a:

1. Element name: Carbon
2. # of protons: 6
3. # of electrons: 6
4. # of neutrons: 6
5. Mass: 12

Problem 4b:

1. Element name: Carbon
2. # of protons: 6
3. # of electrons: 6
4. # of neutrons: 7
5. Mass: 13