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Physical Science 9-Exam
Terms in this set (50)
Boiling point, melting point, and density are some of an element's
A property of an element that does not depend on the amount of the element is called a
An element's ability to react with acid is an example of a
When two or more elements join together chemically,
a compound is formed
The physical properties of compounds do NOT include
Reaction to light
Which of the following will NOT break down compounds?
How do elements join to form compounds?
in a specific mass ratio
Compounds found in all living things include
What is a pure substance made of two or more elements that are chemically combined?
If a spoonful of salt is mixed in a glass of water, what is the water called?
What is a solid solution of a metal or nonmetal dissolved in a metal?
A colloid has properties of both suspensions and
What is formed when particles of two or more substances are distributed evenly among each other?
The flammability of a substance is
a chemical property
How is a compound different from a mixture?
Compounds are commonly found in nature
The particles in both a solution and a colloid
can pass through a fine filter
When elements form mixtures, the elements
keep their original properties
What is NOT a reason that compounds are considered pure substances.
They can be separated by physical method
How are metalloids similar to metals?
Some are shiny, while others are dull
How could a sugar cube be dissolved more quickly in water?
Crush the sugar cube
What pure substance forms when two elements chemically combine?
Why can salt dissolve in water?
Salt is soluble
How can a compound be broken down?
by chemical changes
What forms when particles of two or more substances are evenly mixed?
Which of the following is a chemical property?
B) Reactivity With Acid
C) Boiling Point
Reactivity with acid
What is true about particles in both solutions and colloids?
Particles cannot be filtered
What is not true about compounds?
They form after a physical change
The smallest particle into which an element can be divided and still be the same substance is called a
How would you describe a nucleus?
dense, positively chanrged
Where are electrons likely to be found?
Dalton believed that,
atoms of the same element are exactly alike
What did Democritus, Dalton, Thomson, Rutherford, and Bohr all have in common?
They each contributed to the development of the atomic theory
In Thomson's "plum-pudding" model of the atom, the plums represent
Which of the following has the least mass?
If an isotope of uranium-235, has 92 protons, how many protons does uranium-238 have?
How did Democritus describe atoms?
What is the smallest particle into which an element can be divided and still be the same substance?
An atom of carbon with 6 protons, 6 electrons, and 6 neutrons would have a mass number of
In an atom, which has the least mass?
If hydrogen-1 haas 1 proton, how many does hydrogen-2 have?
What was Dalton's idea?
All substances are made of atoms
What took place in the 1800s?
Dalton's theory was changed
What is the meaning of atom?
What is true about atoms?
A penny has more atoms than the earth has people
What is true about isotopes?
They have the same number of protons
According to Rutherford, what was in the center of an atom?
Which phrase describes radioactive isotopes?
They are unstable
What has the least mass in an atom?
happening at regular intervals
Periodic law states that,
Properties of elements change periodically with the element's atomic number.
Matta, Staley, Waterman, Wilbraham
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1,817 expert-verified explanations
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Holt McDougal Modern Chemistry
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1,855 expert-verified explanations
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