2. Atoms & Elements

Before an atom becomes an ion, what is its overall electric charge?

Which type of ionic imbalance is most likely illustrated by the cell labeled 2?

If a nitrogen atom (N) gains two electrons, which of the following elements would it be isoelectronic with?

Which of the following elements is most likely to form a cation?

Which ion could bond with a calcium ion (Ca^{2+}) to form a neutral ionic compound?

How many electrons are present in a Br⁻ ion?

Why does a sodium atom become a positively charged ion when it loses one electron?

What is the charge of a chloride ion?

How many electrons does a chlorine atom gain to achieve a stable electron configuration?

What is the charge on a sulfide ion formed when sulfur gains electrons to achieve a stable electron configuration?

How many electrons must a neutral chlorine atom gain or lose to become a chloride ion (Cl⁻)?

What is the net charge of an ion that has 11 protons and 10 electrons?

Which of the following is NOT a cation?

Which of the following would be a negative ion with a single charge?

What occurs when a sodium ion (Na+) is attracted to a chloride ion (Cl-)?