1st semester chemistry REVIEW

Front

What is an anion?

Back

An anion is a negatively charged ion that forms when an atom gains one or more electrons.

Front

What is an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

Which element in Period 2 has the greatest atomic radius?

Back

Lithium (Li) has the greatest atomic radius in Period 2.

Front

What is a chemical change?

Back

A chemical change is a process that involves the transformation of one substance into another, such as burning paper.

Front

Which element is the most reactive among F, Cl, Br, and I?

Back

Fluorine (F) is the most reactive element among these.

Front

What happens to an atom when it gains electrons?

Back

When an atom gains electrons, it becomes negatively charged and forms an anion.

Front

What is the trend in atomic radius across a period?

Back

Atomic radius decreases from left to right across a period due to increasing nuclear charge.

Front

What is the trend in reactivity of nonmetals?

Back

Reactivity of nonmetals increases as you move up a group in the periodic table.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number and properties, helping predict their behavior.