Fall Semester Exam 24-25

Front

What are halogens?

Back

Halogens are a group of elements in Group 17 of the periodic table, known for being diatomic gases at room temperature and for their ability to form anions by gaining electrons. They react vigorously with alkali metals.

Front

What should a student do if they swallow sodium hydroxide?

Back

The student should notify the teacher and rinse their mouth.

Front

What is a chemical change?

Back

A chemical change is a process where substances transform into different substances with new chemical properties, such as corrosion of copper.

Front

What is the formula for titanium(II) oxide?

Back

The formula for titanium(II) oxide is TiO.

Front

What lab equipment is best for measuring small precise amounts of liquid?

Back

A graduated cylinder is best for measuring small precise amounts of liquid.

Front

What are the properties of noble gases?

Back

Noble gases are colorless, odorless, and tasteless gases that are non-reactive due to having a full valence shell of electrons.

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 an anion?

Back

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

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What is the role of alkali metals in chemical reactions?

Back

Alkali metals are highly reactive and readily lose one electron to form positive ions, often reacting violently with water.