Periodic Table Review for Semester Exam Fall 2024

Front

What is the atomic mass?

Back

The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu). For example, the atomic mass of Copper (Cu) is approximately 63.546 amu.

Front

What are metalloids (semimetals)?

Back

Metalloids are elements that have properties of both metals and nonmetals. They can conduct electricity better than nonmetals but not as well as metals.

Front

In which period is Sodium (Na) found?

Back

Sodium (Na) is found in period 3 of the periodic table.

Front

What are the horizontal rows on the periodic table called?

Back

The horizontal rows on the periodic table are called periods.

Front

Which element has the most similar properties to Lithium (Li)?

Back

Sodium (Na) has the most similar physical and chemical properties to Lithium (Li).

Front

What are groups in the periodic table?

Back

Groups are vertical columns in the periodic table that contain elements with similar chemical properties.

Front

What is the significance of the atomic number?

Back

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

Front

What are noble gases?

Back

Noble gases are elements in group 18 of the periodic table that are colorless, odorless, and inert under standard conditions.

Front

What is the difference between metals and nonmetals?

Back

Metals are typically shiny, malleable, and good conductors of heat and electricity, while nonmetals are usually dull, brittle, and poor conductors.

Front

What is an isotope?

Back

An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons.