Chemistry Midterm Review

Front

What is a mixture?

Back

A mixture is a combination of two or more substances where each substance retains its own properties.

Front

What are elements in the same vertical column of the periodic table called?

Back

Groups or Families.

Front

What do elements in the same period of the periodic table have in common?

Back

They have the same number of energy levels.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the atomic number of iodine (I)?

Back

53.

Front

What is pressure?

Back

Pressure is the force applied per unit area, commonly measured in units like mmHg.

Front

What is the unit of pressure represented by 258 mmHg?

Back

Millimeters of mercury (mmHg) is a unit of pressure.

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 physical combination of substances.

Front

What is the significance of the periodic table?

Back

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

Front

What are periods in the periodic table?

Back

Periods are horizontal rows in the periodic table, indicating the number of energy levels of the elements.