Chemistry T.e.w. Practice Test 3

Front 1

True or False

Elements in the upper right of the periodic table are active nonmetals.
And they have larger ionic radii than atomic radii.

Back 1

True

Hint 1

Nonmetals have a tendency to gain electrons readily.

Front 2

True or False

A synthesis reaction with a high heat of formation
will occur until some heat is added
BECAUSE the reaction needs enough activation energy to get it started.

Back 2

True

Front 3

True or False

Transition elements in a particular period often have the same oxidation number.

Back 3

True

Hint 3

Tranistion elements have incomplete inner energy levels which
are being filled with the additional electrons,
thus leaving the outer energy level the same in most cases.

This gives these elements common oxidation numbers.

Front 4

True or False

When a crystal is added to a super-saturated solution,
of itself, the crystal does not change
BECAUSE the solution cannot hold more solute.

Back 4

False

Hint 4

A supersaturated solution is holding more than its normal solubility,
and the addition of a crystal causes a crystallization to occur.

Front 5

True or False

Equilibrium is a static condition
BECAUSE the forward reaction rate equals the reverse reaction rate.

Back 5

False

Hint 5

Equilibrium is a dynamic condition because of the reason stated.

Front 6

True or False

The most electronegative elements in the periodic chart
are found among nonmetals
BECAUSE electronegativity is a measure of the ability of an atom
to draw valence electrons to itself.

Back 6

True

Front 7

True or False

Basic anhydrides react in water to form bases
BECAUSE nonmetallic oxides react with water to form a solution
that has an excess of hydroxide ions.

Back 7

True