WorksheetsElements and Compounds for class 8
Total questions: 20
Worksheet time: 14mins
Carbon is considered an element, while carbon dioxide is considered a compound. This is because carbon dioxide is ---
a gas at room temperature.
made of two different elements.
given off by green plants.
useful to human beings
A section of the Periodic Table is shown. What is the Chemical Symbol for Magnesium?
12
Magnesium
24.31
Mg
Compounds are different than elements because compounds are ---
combinations of two or more elements.
not able to be broken down into parts.
made from the same type of atoms.
a pure substance; elements are not.
The smallest particle of any particular type of matter is known by which of the following terms?
Element
Chemical
Atom
Compound
Na2CO3
What is the difference between Co and CO?
CO is an element but Co is a compound
Nothing is different. They are the same thing.
CO is two elements and Co is only one element
Co is not a pure substance
Which is the best description of an element?
A substance that cannot be broken down into simpler substances
A collection of atoms that have different abilities when joined together
A man-made mineral
A mixture of substances
This picture represents which of the following?
element
compound
This picture represents which of the following?
element
compound
Use your Periodic Table to identify the elements below based on its
symbol. Write the name of the element in the space provided.
S
Sulfur
Salt
Selenium
Silicon
Use your Periodic Table to identify the elements below based on its
symbol. Write the name of the element in the space provided.
Na
Silicon
Hydrogen
Lithium
Sodium
Use your Periodic Table to identify the elements below based on its
symbol. Write the name of the element in the space provided.
Cl
Calcium
Carbon
Chlorine
Chromium
Use your Periodic Table to identify the elements below based on its
symbol. Write the name of the element in the space provided.
N
Neon
Nitrogen
Sodium
Krypton
Use your Periodic Table to identify the elements below based on its
symbol. Write the name of the element in the space provided.
Au
Silver
Copper
Iron
Gold
CS
Which elements are in the chemical formula shown above?
Cesium only
Copper and Selenium
Carbon and Sulfur
Carbon and Silicon
Co
Which elements are in the formula shown above?
Copper only
Cobalt only
Carbon and oxygen
Carbon and Osmium
