2024 Honors Chemistry Final Exam

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into different substances with distinct properties, often involving a reaction that produces heat, light, or gas.

Front

What happens to paper when it is burned?

Back

Burning paper is a chemical change that transforms it into ash, carbon dioxide, and water vapor.

Front

What are alkali metals?

Back

Alkali metals are elements in Group 1 of the periodic table, characterized by their high reactivity, especially with water, and the presence of one valence electron.

Front

What is the reactivity trend of alkali metals?

Back

Alkali metals become more reactive as you move down the group in the periodic table.

Front

What defines elements in the same group of the periodic table?

Back

Elements in the same group have similar chemical properties and the same number of valence electrons.

Front

What is the significance of valence electrons?

Back

Valence electrons determine how an atom can bond with other atoms and are crucial for understanding chemical reactivity.

Front

What occurs when an atom loses valence electrons?

Back

When an atom loses valence electrons, it becomes a positive ion (cation) due to the loss of negative charge.

Front

What is the electron configuration of a neutral oxygen atom?

Back

The electron configuration of a neutral oxygen atom is 1s² 2s² 2p⁴.

Front

How do you determine the number of valence electrons in an element?

Back

The number of valence electrons can be determined by the group number of the element in the periodic table.

Front

What is the difference between metals and nonmetals in the periodic table?

Back

Metals are typically good conductors of heat and electricity, while nonmetals are poor conductors and have more varied properties.