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WorksheetsElements, Compounds and Mixtures
Total questions: 15
Worksheet time: 7mins
What is a compound?
Two or more different substances that are not chemically bonded
Two or more atoms of the same element that are chemically bonded
Two or more atoms from different elements that are chemically bonded
Two or more different substances that are mixed but not bonded to each othe
Which of the following statements is true (there may be more than one answer)?
A molecule consists of two or more atoms that are chemically bonded.
A molecule must be made of only one kind of atom.
A molecule may consist of the same type of atoms, or atoms from different elements.
H2O is a molecule
True or False: all compounds are molecules
True
False
This image shows:
A mixture of elements
A mixture of compounds
A mixture of elements and compounds
What is the expression that represents this image?
CH4N2O2
C +H4 + N2O2
H2O + N2O + CH2
C + H2 +N2O
Which of the following statements about elements is FALSE?
Elements cannot be broken down farther and maintain their properties
Elements are found on the periodic table
Elements in a molecule can be easily separated by physical means
Elements bond together to form compounds
Which of the boxes on the left represent a mixture?
A, B, C
E, F, H
B, C, G
D, G, H
Which of the boxes on the left represents only elements?
A, D, H
E, F, H
C, G, I
A D, I
True or False: Mixtures can be separated by various techniques such as evaporation, magnetic separation and filtration.
True
False
Which of these is NOT a mixture?
Air
Trail Mix
Salt Water
CO2
True or False: An element contains only one type of atom.
True
False
True or False: A compound consists of only one type of atom.
True
False
An element is a pure substance that can't be separated into anything simpler by physical means.
Pure gold is an element because it only contains gold atoms.
True or False?
Which expression below represents the image to the left?
2H2O + H + C + 2N
3H + 2O + 2C+ 2N
H2O + N2O + 2C + H
H3O2N2C2
