Fall Final Exam NGSS Chemistry

Front

Why do helium balloons rise on Earth?

Back

Helium is less dense than air.

Front

What group of elements contains the most reactive metals?

Back

Group 1.

Front

What does the Law of Conservation of Energy state?

Back

Energy cannot be created or destroyed, it can only be transformed.

Front

Which group of elements has the greatest number of valence electrons?

Back

Group 18.

Front

What is an example of energy conversion from light energy to chemical energy?

Back

Growing an apple tree.

Front

What is density?

Back

Density is the mass of an object divided by its volume.

Front

What is the periodic table?

Back

A tabular arrangement of chemical elements, organized by their atomic number, electron configuration, and recurring chemical properties.

Front

What are valence electrons?

Back

Electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

What is a chemical reaction?

Back

A process that leads to the transformation of one set of chemical substances to another.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.