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Chemistry and the Periodic Table Flashcards | StudBud
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Chemistry and the Periodic Table
Chemistry and the Periodic Table
20 terms
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A #review for #chemistry
Flashcards
20 cards
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Practice quiz
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Questions
20
Answers
1
How many atoms are in a glucose molecule?
18
24
12
6
2
Which of the following is an element?
CO2
H2O
Co
NaCl
3
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.
4
Which of the following is a compound?
O2
Dy
Re
NaHCO3
5
Which change can be easily reversed?
Chemical
Physical
6
Bubbles can be seen when baking soda is mixed with vinegar. They are evidence of....
A gas is formed when baking soda and vinegar are mixed.
Vinegar turns into alcohol when mixed with baking soda.
A precipitate is formed when they are mixed.
Baking soda dissolves in vinegar when they are mixed.
7
Which of the following characteristics is shared by all chemical reactions?
Release heat energy
Show a color change
Form new substances
Produce a precipitate
8
What is the chemical symbol for Iron?
55.85
Iron
26
Fe
9
All of these properties describe metals EXCEPT —
conductor
malleable
brittle
shiny
10
Which is the most abundant element in the Earth's crust?
Oxygen
Hydrogen
Nitrogen
Sulfur
11
Conductivity is a physical property of matter that describes its ability to —
exist in nature as a solid, liquid, or gas.
reflect light from its lustrous surface.
transfer thermal and electrical energy.
be hammered and rolled into thin sheets.
12
Which of the following is a physical property?
Flammability
Density
Ability to react with H2O
Ability to react with light
13
Two substances are mixed, which of the following would indicate a new substance has formed?
The temperature of the mixture decreases.
One of the substances dissolves.
The mass of the mixture increases.
The volume of the mixture increases
14
______________ are brittle, dull and have no coductivity.
Metalloids
Nonmetals
Metals
15
Which would help a student classify an unknown element as a metal, metalloid, or non-metal?
Determine its density
Observe its color
Measure its conductivity
Find its melting point
16
Polonium is metallic, a semiconductor and can somewhat be shaped into sheets it is a ....
Nonmetal
Metal
Metalloid
17
The smallest particle of any particular type of matter is known by .........
element
atom
chemical
compound
18
The atmosphere of Earth is comprised mostly of oxygen and –
hydrogen
carbon
nitrogen
silicon
19
Which most likely has a shiny luster?
Metalloid
Metal
Nonmetal
20
Diet Coke and Mentos lab is an example of what kind of change?
Physical
Chemical
