Honors Chemistry Midterm Review 2020

Front

What is the chemical symbol for Lithium?

Back

Li

Front

What are homogeneous mixtures called?

Back

Solutions.

Front

What orbitals are present in the second energy level?

Back

s and p

Front

What is a chemical property? Give an example.

Back

A chemical property is a characteristic that can only be observed during a chemical reaction. Example: ability to burn.

Front

What is the difference between a mixture and a pure substance?

Back

A mixture contains two or more substances that are not chemically combined, while a pure substance has a uniform and definite composition.

Front

Define electron configuration.

Back

Electron configuration is the distribution of electrons in an atom's orbitals.

Front

What is the significance of the periodic table in chemistry?

Back

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

Front

What is an example of a physical change?

Back

Melting of ice is an example of a physical change.

Front

What is the law of conservation of mass?

Back

The law states that mass is neither created nor destroyed in a chemical reaction.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.