Physical Properties
Chemical Properties
Elements
Compounds
Mixtures
100

The mass percent of oxygen in pure glucose, C6H12O6 is 53.3 percent. A chemist analyzes a sample of glucose that contains impurities and determines that the mass percent of oxygen is 49.7 percent. Which of the follow impurities could account for the low mass percent of oxygen in the sample?

a.n-eicosane (C20H42)

b.ribose C5H10O5

c.fructose, C6H12O6

d.sucrose C12H22O11

100
0-7 on the pH scale are ________.
What are acids.
100
An element is a substance made up of only one kind of ______?
What is an ATOM?
100
In a compound, ___________ from different atoms are shed, shared, or stolen.
What are electrons?
100
A type of mixture in which different substances are spread out unevenly is called a
What is heterogeneous mixture?
200
Which substance is more soluble in water: sugar or oil?
What is sugar?
200
Which is most likely to corrode: a battery, broccoli, bread, or bricks?
What is a battery?
200
What are the 3 main sections of the periodic table?
What are METALS, NON-METALS, & METALLOIDS?
200
How many atoms are in the compound represented by the formula C12H22O11?
What is 45 total atoms?
200
Which of the following is a mixture: granite rock, tin, methane.
What is granite rock?
300
Which has a greater melting point? Ice or gold?
What is gold?
300
Which would be the most reactive: magnesium (Mg), gold (Au), helium (He), or mercury (Hg)?
What is magnesium (Mg)?
300
The 2 most reactive groups of elements are which ones?
What are groups 1 (alkali metals) & 17 (halogens)?
300
Which of the following is a compound: uranium, Lucky Charms cereal, propane?
What is propane?
300
Which of the following is a homogeneous mixture: Chex Mix cereal or ketchup?
What is ketchup?
400
What happens to the molecules in water as heat energy is added?
What is the molecules move faster and farther apart.
400
Which of the following involves a chemical reaction: condensation, combustion, dissolving, evaporation?
What is combustion?
400
The least reactive elements belong to which group?
What are the noble gases (group 18)?
400
How many open spots does Sulfur (S) have in its outer-most energy level?
What is 2?
400
Explain the difference between a homogeneous and heterogeneous mixture.
What is homogeneous mixtures are evenly mixed throughout - not chemically combined.
500
Which state of matter has a definite volume and a not definite shape?
What is liquid?
500
What are the 4 signs of a chemical reaction taking place?
What is 1) temperature change 2) color change 3) bubbles 4) formation of solids
500
Draw the atomic model for carbon.
What is 6 protons & 6 neutron in the nucleus and 2 electrons on level 1 and 4 electrons on level 2?
500
How do the properties of a compound compare with the properties of the elements that make it?
They are usually very different.
500
What is the difference between mixtures and compounds?
What is compounds are combinations of elements chemically combined, mixtures are combinations of compounds mixed together.
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