Classification of Matter STUDY GUIDE

Front

What is the least reactive element among Mg, Na, C, and S?

Back

S

Front

True or False: Compounds can be identified by their formula, which tells us they contain multiple elements bonded together.

Back

True

Front

What type of change occurs when wood is burned?

Back

Chemical change

Front

Which element is the least reactive among Li, Ne, B, and C?

Back

Ne

Front

Who proposed the atomic model with electrons moving in specific layers?

Back

Bohr

Front

Define 'element'.

Back

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

Front

What is a 'compound'?

Back

A substance formed when two or more elements are chemically bonded together.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the periodic table?

Back

A tabular arrangement of elements, organized by increasing atomic number, that shows periodic trends.

Front

What is an atom?

Back

The smallest unit of an element that retains the properties of that element.