2. Atoms & Elements

Atoms with the same number of protons but with different electrical charges are called:

How many electrons are present in an Al^{3+} ion?

What is the name given to an atom that gains or loses electrons in a chemical reaction?

What is the charge of the hydronium ion (H_3O^+)?

Which ion does sulfur most commonly form in ionic compounds?

Magnesium has an atomic number of 12. What is the most stable charge for a magnesium ion?

Which type of elements typically form negatively charged ions (anions)?

Why can't ions typically travel through the cell membrane?

What type of ion is formed when an element loses an electron?

Which of the following conditions produces an anion?

Which term describes a negatively charged ion?

Which of the following best describes an ion?

A cation is an element that _____ one or more electrons to form _____ ions.

Consider an ion with 17 protons and 18 electrons. What is the charge of this ion?

After the transfer of electrons, calcium becomes an ion with a charge of: