could someone help me, im stuck :(

Explain how the isotopes of an element differ.
1.They each have a different number of electrons in their outermost energy level.

2.They each have a different number of protons in their nuclei.

3.They each have a different number of neutrons in their nuclei.

4.They each have a different charge.

Question

could someone help me, im stuck :(

Explain how the isotopes of an element differ.  
1.They each have a different number of electrons in their outermost energy level.

2.They each have a different number of protons in   their nuclei.

3.They each have a different number of neutrons in their nuclei.

4.They each have a different charge.

anonymous · Answer

The answer to this question can be addressed by a definition of isotopes: isotopes have the same chemical properties since they have the same number of electrons (and hence the same number of protons since they are not charged). The difference is in the mass number (the total number of protons and neutrons in the nucleus). I'll let you figure out the rest.