8.6A Elements and the Periodic Table Flashcard (SD)

Front

What are elements?

Back

Pure substances that are not able to be broken down chemically

Front

How many known elements are there currently?

Back

118

Front

Which two elements are the most common in the universe?

Back

Hydrogen and Helium

Front

Which of the following is an example of an element? Helium, Water, Salt, Air

Back

Helium

Front

What do the atom diagrams at the top of the image represent?

Back

Different types of elements

Front

What type of substances are compounds?

Back

Pure substances

Front

What are compounds composed of?

Back

Two or more different elements chemically combined

Front

How can compounds be broken down?

Back

Chemically

Front

How do the properties of compounds compare to the elements that make them up?

Back

Compounds have different properties than the elements that make them up

Front

What is the chemical formula for water?

Back

H₂O