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Unit 3: Periodic Table and Classifying Matter Flashcards | StudBud
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Unit 3: Periodic Table and Classifying Matter
Unit 3: Periodic Table and Classifying Matter
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Standards 7.PS1.5 7.PS1.2 7.PS1.3
Flashcards
22 cards
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Practice quiz
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Questions
22
Answers
1
Which model shows a mixture of two compound molecules?
2
4
3
1
2
What is formed when a potassium atom and bromine atom react chemically?
a new form of matter
a mixture
an element
a compound
3
Which can be broken down chemically into simpler substances?
isotopes
compounds
elements
atoms
4
Which model shows a mixture of pure substances?
3
1
4
2
5
Which of the samples shown represents an element?
3
1
4
2
6
Which of the following is a molecule but is
NOT
a compound?
sodium chloride (NaCl)
water (H2O)
ozone (O3)
carbon dioxide (CO2)
7
Which describes a property of elements?
all elements exist in the solid phase
all elements are pure substances
All elements are metals
All elements have six electrons
8
Which of the following answer choices
BEST
identifies the model
compound, mixture, element
element, mixture, compound
element, compound, mixture
element, compound, mixture
9
Which of the following best describes 2 atoms of oxygen that are chemically bonded?
molecule
mixture
compound
solution
10
Which set of elements have chemical properties similar to those of phosphorus?
nitrogen, arsenic, antimony
carbon, selenium, iodine
silicon, sulfur, chlorine
silicon, sulfur, germanium
11
Vinegar and water are placed into a container and stirred. What is formed when they are mixed?
compound
solution
gas
solid
12
The table shows the procedures and results of an experiment. Which of the following is true?
Physical changes occurred in both experiments
Chemical changes occurred in both experiments.
A chemical change in experiment #1. A physical change in #2
A physical change in experiment #1. A chemical change in #2
13
The symbol for Thulium is Tm. Based on its symbol, what can be concluded about Thulium?
Thulium is a compound
Thulium is a mixture
Thulium is a metal
Thulium is an element
14
Betsy puts up a bird feeder that contains sunflower seeds + corn. Which term best describes it?
a solution
a heterogeneous mixture
a homogeneous mixture
a compound
15
Which set of elements is the
MOST
similar in chemical behavior or properties? (Use PTable)
Ti, V,Cr
H, Be,Sc
Be, Ca,Ra
Fr, Ra,Rf
16
When zinc and copper are melted together, brass is formed. Brass is an example of...
a solute
a mixture
a mineral
an element
17
Which characteristic of an element determines its placement on the periodic table?
size
number of protons
number of neutrons
mass
18
Which type of matter can be separated by physical means?
compound
element
atom
mixture
19
Almost all elements on the
left
side of the PTable have which of these properties in common?
They are solids at room temperature
They don't conduct electricity
They are radioactive
They are brittle and dull
20
Which statement
BEST
describes the organization of elements on the periodic table?
Gases easily form compounds with other elements.
All gases are grouped together.
Elements within a period have the same number of electrons
Elements within a group have similar properties
21
You are testing a solid material. Which would
MOST
likely indicate it's a mixture?
The material reacts with an acid solution to form gas
The material does not dissolve completely in water.
The material does not melt when it is heated over a burner
The material has crystals of two different colors.
22
Your teacher writes 4 statements on the board. Which statement
BEST
describes a mixture?
One substance can be separated from another
One substance dissolves into another
Both substances can evaporate
Both substances mix evenly
