Matter And Atoms Question Preview (ID: 43254)


Atoms, Isotopes, Solubility, Acids And Bases. TEACHERS: click here for quick copy question ID numbers.

How many protons are there in an atom of gold?
a) 47
b) 79
c) 89
d) 25

When you add so much solute that no more dissolves because you have reached the maximum amount that can be dissolved, you have created a ____________ solution.
a) supersaturated
b) unsaturated
c) saturated
d) monosaturated

What is the difference between a pure substance and a mixture?
a) Pure substances are not chemically combined like mixtures.
b) Mixtures are not chemically combined like pure substances
c) Pure substances are physically combined.
d) Mixtures are chemically combined.

In the isotope named Lithium-7, the 7 represents which piece of information?
a) the atomic number
b) the mass number
c) the number of protons
d) the number of neutrons

What is the universal solvent?
a) water
b) salt
c) vinegar
d) olive oil

Unsaturated solutions are identified on a solubility curve by determining if the solution's point is...
a) below the line
b) on the line
c) above the line
d) higher than the line

Air is comprised of about 78% Nitrogen, 21% Oxygen, and less than 1% other gases. In a sample of clean air, what would the solvent be?
a) Nitrogen
b) Oxygen
c) Other gases
d) All of them

Sterling silver is an alloy of silver that consists of 92.5% pure silver and 7.5% copper. Which metal is the solute?
a) tin
b) copper
c) silver
d) lead

Sterling silver is an alloy of silver that consists of 92.5% pure silver and 7.5% copper. Which metal is the solvent?
a) silver
b) copper
c) lead
d) tin

If a substance is SOLUBLE in water...
a) the substance will not dissolve in water.
b) the substance will not dissolve in milk.
c) the substance will dissolve in water.
d) the substance will not mix with water or milk.

Which of the following is a way to increase the rate of solubility of a solution?
a) Stir it
b) Let it sit by itself without stirring
c) Use colder water
d) Use a whole sugar cube instead of crushing it

If a substance turns litmus paper RED the substance is ...
a) an acid and has a pH above 7
b) a base and has a pH below 7
c) a base and has a pH above 7
d) an acid and has a pH below 7

Highly concentrated NaOH has a pH of 13. How could it be classified?
a) Strong acid
b) Strong base
c) Weak acid
d) Weak base

Acids...
a) taste sour and have lots of OH- ions
b) taste bitter and have lots of OH- ions
c) taste sour and have lots of H+ ions
d) taste bitter and have lots of H+ ions

A substance that turns litmus paper blue will have a pH _____________ 7.
a) equal to
b) greater than
c) less than
d) fewer than

Which element has 12 protons in its atom?
a) Carbon
b) Magnesium
c) Aluminum
d) Sulfur

Which two subatomic particles do you add together in order to determine the mass of the atom?
a) proton and neutron
b) proton and electron
c) neutron and electron
d) electron and proton

How many neutrons are located in the nucleus of a sodium-23 atom?
a) 23
b) 11
c) 12
d) 13

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