All High School Chemistry Resources
Example Questions
Example Question #41 : Elements And Compounds
What is the difference between chlorine-35 and chlorine-37?
Chlorine-37 has more neutrons
Chlorine-37 has more electrons
They are identical. They are just different different atoms in the same sample
Chlorine-37 has a smaller atomic mass
Chlorine-37 has more protons
Chlorine-37 has more neutrons
Chlorine-35 and chlorine-37 are isotopes of each other. Isotopes are atoms of the same element that have different masses due to different numbers of neutrons.
Example Question #42 : Elements And Compounds
An atom of iron has two electrons removed. Write out the ion in the form of where X is the atomic symbol and m is the charge. Identify this ion as either a cation, anion or neutral.
Cation
Anion
Anion
Neutral
Cation
We know that the element is iron and that it is missing two electrons. This means that the atom has two less electrons than it has protons resulting in a charge of 2+. This can be written as
If an ion is positively charged it is a cation. If it is negatively charged (more electrons than protons) it is an anion.
The ion is a cation since it has a charge of 2+.