Periodic Table Practice Questions

Front

What are valence electrons?

Back

Valence electrons are the electrons located in the outermost energy level of an atom, which are involved in chemical bonding.

Front

Which group of elements is known as halogens?

Back

Halogens are the elements found in Group 17 of the periodic table, which includes fluorine, chlorine, bromine, iodine, and astatine.

Front

What do periods on the periodic table indicate?

Back

Periods indicate the number of energy levels in an atom. Each period corresponds to a row in the periodic table.

Front

What are noble gases?

Back

Noble gases are the elements in Group 18 of the periodic table, known for their lack of reactivity due to having a full valence shell.

Front

Identify a characteristic of halogens.

Back

Halogens are highly reactive nonmetals and tend to form salts when they react with metals.

Front

What is the significance of the atomic number?

Back

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

Front

What is the difference between metals and nonmetals?

Back

Metals are typically shiny, conductive, and malleable, while nonmetals are dull, insulative, and brittle.

Front

What is an ion?

Back

An ion is an atom or molecule that has gained or lost one or more electrons, resulting in a net charge.

Front

What is the role of electrons in chemical bonding?

Back

Electrons, particularly valence electrons, are involved in forming bonds between atoms, allowing them to create molecules.

Front

What is the periodic law?

Back

The periodic law states that the properties of elements are a periodic function of their atomic numbers.