Chemistry Midterm Review

Front

What is a pressure value?

Back

A pressure value is a measurement of force applied per unit area, commonly expressed in units such as mmHg, atm, or pascals. Example: 258 mmHg.

Front

What experiment discovered electrons?

Back

The Cathode-Ray Tube Experiment was responsible for discovering electrons, which are negatively charged particles.

Front

What does 'C-12' represent in isotopic notation?

Back

C-12 represents carbon with 6 protons and 6 neutrons.

Front

What are the elements in Group 18 of the periodic table known as?

Back

Elements in Group 18 are known as Noble gases.

Front

What happens to the atomic radius as you move down a group on the periodic table?

Back

The atomic radius increases as you move down a group on the periodic table.

Front

Define isotopes.

Back

Isotopes are variants of a chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

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 are alkali metals?

Back

Alkali metals are elements in Group 1 of the periodic table, known for being highly reactive and having one electron in their outermost shell.

Front

What is the difference between a compound and a mixture?

Back

A compound is a substance formed when two or more elements chemically bond, while a mixture is a combination of two or more substances that retain their individual properties.