1.1 ENTRY QUIZ Study of Chemistry

Which of the following best defines matter?

• Any substance that can be seen with the naked eye

• The physical material of the universe; anything that has mass and occupies space

• Only solid substances that can be touched

• Chemical compounds found in living organisms

• Energy in its various forms

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What is a property in chemistry?

• Something that belongs to a specific scientist

• A type of chemical reaction

• Any characteristic that allows us to recognize a particular type of matter and distinguish it from other types

• The location where matter is found

• The cost of a chemical substance

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How many elements make up all matter in the universe?

• Exactly 50 substances

• More than 500 substances

• A little over 100 substances

• An infinite number of substances

• Only 10 basic substances

Which statement best describes atoms?

• Large particles visible under a microscope

• The exceedingly small building blocks of matter, with each element composed of a unique kind of atom

• Only found in living organisms

• Particles that exist only in gases

• Chemical compounds made of multiple elements

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What is a molecule?

• A single atom by itself

• Two or more atoms that are joined in specific shapes

• Only atoms of the same element bonded together

• A type of chemical property

• The smallest unit of an element

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What can we say about matter and the study of chemistry?

• Matter only exists in liquid form and chemistry studies how to create new elements

• Matter is anything that takes up space and can be described by its properties; chemistry studies why matter is the way it is

• Matter cannot be studied scientifically and chemistry only deals with gases

• Matter has no describable characteristics and chemistry focuses on energy alone

• Matter exists only in laboratories and chemistry studies only synthetic materials

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How is matter composed and what gives it different properties?

• Matter is made of combinations of substances called elements; the smallest unit of an element is an atom and different combinations and arrangements of these give matter its different properties

• Matter is made of only one type of substance and all matter has identical properties

• Matter contains no smaller units and its properties cannot be explained

• Matter is composed only of molecules and has no relationship to elements or atoms

• Matter is made of energy particles that cannot be broken down further

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What is a molecule?

• Only single atoms that exist independently

• One or more atoms of elements combined together

• A type of element that cannot be broken down

• Only combinations of identical atoms

• A form of energy that exists between atoms

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Which of the following statements is false?

• All matter is composed of atoms of the elements.

• The atoms of different elements must be different.

• A molecule must contain atoms from two or more elements.

• Different molecules can be made from the same elements.

• Matter has mass and occupies space.

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The molecule shown here is propylene glycol, a substance that is used extensively in the chemical industry. The color key is: White = hydrogen, red = oxygen, black = carbon. How many carbon atoms are in a molecule of propylene glycol?

• 2

• 3

• 5

• 8

• 13

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