ch 1
In the laboratory, volumes of liquid are usually measured with a(n)
graduated cylinder.
At its freezing temperature, the particles of a liquid are moving so slowly that they
begin to form regular patterns.
False
Which group contains the most elements?
nonmetals
The chemical name for the compound with the formula Na S is
sodium sulfide.
The minimum amount of energy needed to start a reaction is the
activation energy.
Anything that has mass and takes up space is called
matter.
The greater the speed of gas particles in a container, the
greater the pressure.
In general, which of the following statements about metals is true?
Metals are malleable, ductile, and can carry an electric current.
A low melting point is one property of molecular compounds.
True
The substances listed on the left side of a chemical equation are the
reactants.
A change that produces one or more new substances is called a physical change.
false
What is vaporization?
a liquid becoming a gas
Groups 3-12 are called the _____________ metals.
alkaline Earth
Magnesium bromide is an ionic compound with the chemical formula MgBr . What
does the “2” tell you?
There are two bromide ions for every magnesium ion.
Chemicals that act as biological catalysts by speeding up reactions in living things
are called
enzymes.
To find the mass of a rectangular object, you multiply the object’s length, width, and
height.
true
The surface of water can act like a sort of skin due to a property of liquids called
viscosity.
Group 2 metals are harder, denser, and melt at higher temperatures than Group 1
metals. Group 1 metals are Alkali Metals. What are Group 2 metals called?
Alkaline Earth Metals
Ionic compounds are electrically
neutral.
A shorter, easier way to show a chemical reaction, using symbols instead of words,
is called a
chemical equation.
H O, CO , and C H O are all examples of chemical
formulas
The resistance of a liquid to flowing is its
viscosity
The elements in a row of the periodic table
are in the same family.
Which of the following groups contains the most reactive elements?
the alkali metals
A material used to decrease the rate of a chemical reaction is a(n)
inhibitor