Vocabulary Week of Jan 10, 2016 Week 1 – Quiz: Jan 18, 2016
1. Atom: the smallest particle of an element that can take part in a chemical
reaction
2. Molecule: a collection of two or more atoms held together by chemical
bonds. The fundamental unit of compounds.
3. Compound: a substance formed by the chemical combination of two or
more elements in fixed proportions
4. Matter: anything that occupies space and has mass
5. Substance: A material with a constant composition
6. SI Unit: The International System of Units (French: Système international
d'unités, SI) is the modern form of the metric system, and is the most
widely used system of measurement.
7. Element: A substance which cannot be further divided into simpler
substances by chemical methods; all the atoms of an element contain the
same number of protons
8. Mixture: Is made up of substances that are not chemically joined together
9. Dissolve: The mixing of a substance (solute) with a liquid (solvent) to
make a solution.
10. . Pure vs Impure substance: A substance is pure if it has no other
substances mixed with it. A substance is impure if it has different
substances mixed with it.
First I gave you a little HISTORY to help you understand the philosophy that
created this world of Chemistry.
Second I told you that Philosophy allowed scientists (years later) to think about
and define the ATOM, which we defined as the smallest unit of matter able to
take place in a chemical reaction (or actually I think I said the smallest particle of
an element). Next, I stated that atoms come together to form MOLECULES, which
I defined as two or more BONDED atoms.
NEXT, to put things in context, I stated that our bodies are made up of mostly
Molecules like DNA and Carbohydrates, Proteins, Lipids. However, there are
more molecules out there in the universe that are not vital (Essential/ You
cannot live without them) to our INFASTRUCTURE (Inside structure), and,
therefore, historically (because we tend to see the world in the context of living
and not living) Molecules are categorized as being : ORGANIC (like DNA or
Protein) or INORGANIC (everything else). And, the defining difference is that
organic molecules have carbon-carbon bonds (or you could say CHAINS of
Carbon). Everything else is inorganic. AND I defined Organic and Inorganic in
the context of SUBSTANCES. I said that organic substances are compounds that
contain the element carbon (and I added in chains or 2 or more). And that
Inorganic Substances are elements and compounds of all elements other than
carbon.
For purposes of organization it has been decided that all matter be broken down
into categories. Those are Substances (or “Pure Substances”) and Mixtures.
9. Define “SI” and give an example discussed in class:
Units of measurement
the modern form of the metric system, and is the most widely used system of
measurement. For example, the Kilogram is the standard unit of measurement
for Mass.
10. Label each image below with the appropriate state of matter it represents.
Solid
Gas
Liquid
11. Label each of the following as either a A: mixture or a B: substance:
Answer A or B.
A
A
B
12. Label each of the following images as either an A: Elemental substance
or B: Compound Substance. Answer A or B.
Copper
Salt
Hydrogen
B
A
A
B
13. Label each of the following as either an A: Atom(s) or B: Molecule(s).
B
B
B
A
B
A
A
B
14. Match the following images with their labels
Molecules of a Compound
Mixture of Elements and a
Compound
Molecules of an Element
Atoms of an Element
15. Match the following images with their labels
a. Pure Element
b. Pure Compound
c. Mixture of Elements
d. Mixture of Compounds
e. Mixture of Elements and Compounds
A
B
C
D
E