Chemistry-STAAR Review

Front

What is a period in the periodic table?

Back

A period is a horizontal row in the periodic table where elements have the same number of electron shells.

Front

What is a group in the periodic table?

Back

A group is a vertical column in the periodic table where elements have similar chemical properties and the same number of valence electrons.

Front

What element has 11 protons and 1 valence electron?

Back

Sodium (Na) is the element with 11 protons and is highly reactive.

Front

What are metalloids?

Back

Metalloids are elements that have properties of both metals and nonmetals, such as silicon.

Front

How many valence electrons does a carbon atom have?

Back

A carbon atom has 4 valence electrons.

Front

What is the definition of a semiconductor?

Back

A semiconductor is a material that has electrical conductivity between that of a conductor and an insulator, often used in electronic devices.

Front

What is the significance of valence electrons in chemical reactivity?

Back

Valence electrons determine how an atom can bond with other atoms, influencing its chemical reactivity.

Front

What is the periodic law?

Back

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

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 example of a highly reactive element?

Back

Sodium (Na) is an example of a highly reactive element.