Identify the number of protons, neutrons, and electrons in a charged cation of aluminum (mass number = 27).

If a neutron is added to the nucleus of an atom, which of the following has changed?

Which of the following will result in an ion?

Which of the following is a naturally occurring isotope of carbon-12?

Which of the following elements is isoelectronic with an oxygen ion?

Which is the isotopic notation for an isotope of an element with 19 protons and 20 neutrons.

Which element is isoelectronic with a bromide ion?

Which of the following answer choices is not isoelectronic with the other atoms listed?

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.

What is the difference between chlorine-35 and chlorine-37?