Science-Ch. 3 Question Preview (ID: 43941)


Atoms, Elements, And Matter-rest Are Repeats To Be Studied Off Previous Test. TEACHERS: click here for quick copy question ID numbers.

All _______________ except mercury are solids at room temperature.
a) metalloids
b) nonmetals
c) metals
d) mixtures

Most of the mass of an atom is found in its __________________.
a) nucleus
b) electron cloud
c) atomic number
d) mass number

When someone stirs cocoa powder into hot water or hot milk, the cocoa changes from a __________________.
a) homogeneous mixture into a compound
b) homogeneous mixture into a non-uniform mixture
c) compound into a heterogeneous mixture
d) heterogeneous mixture into a homogeneous mixture

In general, metals are ________________.
a) poor conductors of heat
b) brittle
c) poor conductors of electricity
d) good conductors of heat

Matter that has the same composition and properties throughout is called a(n)
a) substance
b) mixture
c) atom
d) isotope

When Rutherford performed his metal foil experiment, he was surprised that most of the alpha particles _______________.
a) were deflected by the foil
b) bounced back from the foil
c) were absorbed by the the foil
d) passed straight through the foil

Vegetable soup is an example of a ____________________.
a) homogeneous mixture
b) heterogeneous mixture
c) compound
d) pure substance

When two pure substances are combined so that each of the pure substances retains its own properties, the result is a (n)
a) compound
b) mixture
c) element
d) isotope

Which of these statements about matter is NOT true?
a) During chemical changes, matter is destroyed.
b) Matter has mass and takes up space.
c) Matter can be divided into pure substances and mixtures.
d) Matter is made up of atoms.

_______________ has mass and takes up space.
a) Thought
b) Light
c) Air
d) Emotion

How many atoms of calcium are in a unit of calcium phosphate whose formula is Ca3(PO4)2
a) one
b) two
c) three
d) four

Which of the following cannot be classified as matter?
a) an odorless, colorless gas
b) the heat given off by a light bulb
c) alpha particles
d) an electron cloud

The millions of compounds that exist are made from approximately _____________elements.
a) 50
b) 75
c) 115
d) 150

In general, nonmetals are __________________.
a) good conductors of electricity
b) malleable and ductile
c) good conductors of heat
d) gases at room temperature

A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is _____________.
a) 26
b) 30
c) 52
d) 56

Water and hydrogen peroxide have different properties because ______________.
a) they are made from different elements
b) one contains a greater percentage of oxygen than the other
c) one is a compound and one is a mixture
d) only water follows the law of definite proportions

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