Chemistry- Elements (7th Grade Science)

Front

What type of radiation can a piece of paper protect you from?

Back

Alpha radiation.

Front

What is a property of bromine that cannot be predicted based on its classification as a nonmetal in the halogen family?

Back

Liquid at room temperature.

Front

What does the atomic number of an element represent?

Back

The number of protons in its nucleus.

Front

What is one use of measurements of half-life in radioactive isotopes?

Back

Determining the ages of rocks and fossils.

Front

What state are most metals in at room temperature?

Back

Solid.

Front

What is the definition of an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What are the three main types of radiation?

Back

Alpha, beta, and gamma radiation.

Front

What is a characteristic of nonmetals?

Back

They are generally poor conductors of heat and electricity.

Front

What is the significance of the periodic table in chemistry?

Back

It organizes elements based on their atomic number and properties.

Front

What is a halogen?

Back

A group of nonmetals in Group 17 of the periodic table, known for their reactivity.