Chemistry Test: Questions

Homo or Hetero: wild bird seed

hetero

Homo o Hetero: gasoline

homo

Homo or Hetero: air

homo

Homo or Hetero: dirt

homo

Homo or Hetero: hand lotion

homo

Homo or Hetero: stainless steel

homo

Homo or Hetero: vinegar

homo

Physical or Chemical: breaking a pencil in half

p

Physical or Chemical: grinding coffee beans

p

Physical or Chemical: ice melting

p

Physical/intensive, physical/extensive, chemical: density

physical/extensive

Physical/intensive, physical/extensive, chemical: mass

physical/extensive

Physical/intensive, physical/extensive, chemical: ability to conduct electricity

physical/intensive

Physical/intensive, physical/extensive, chemical: boiling point

physical/intensive

Physical/intensive, physical/extensive, chemical: color

physical/intensive

Physical/intensive, physical/extensive, chemical: malleability

physical/intensive

True or False: The prefix deci- indicates a larger number than the prefix centi-.

true

True or False: alkali metals are shiny gray solids soft enough to be cut by a knife

true

True or False: alkaline earth metals form ions with a 2+ charge

true

True or False: neutrons have no electrical charge

true

True or False: potassium chloride can be used as a substitute for sodium chloride

true

True or False: sodium and potassium are the most abundant alkali metals

true

True or False: the metal lithium has a diagonal relationship with the metal magnesium

true

Physical or Chemical: hard-boiling an egg

c

Physical or Chemical: silver tarnishing

c

Physical or Chemical: wood burning

c

The ratio of an error to an accepted value is called a(n) a) accuracy-to-precision value b) accuracy c) percent error d) precision

c

Lustrous, malleable, ductile elements that are good conductors of electricity and heat are classified as: a) metals b) nonmetals c) metalloids d) noble gases

a

The difference between an accepted value and an experimental value is called a(n) a) error b) percent error c) measured value d) precise measurement

a

When a substance's valence electrons are slightly attracted to a magnetic field, the substance displays a) paramagnetism b) diamagnetism c) ferromagnetism d) a diagonal relationship

a

Which is a compound? a) salt b) air c) nickel

a

Which is an element? a) gold b) methane c) steam d) sterling silver

a

Which statement best describes the relationship between boron and silicon? a) they have a diagonal relationship b) they are in the same group c) they are in the same period d) they are both metals

a

You calculate that 319,000,000 m is the answer to problem. You are asked to write your answer in scientific notation. Which answer is correct? a) 3.19X10 8 b) 31.9X10 10 c) 32X10 10 d) both b and c

a

You calculate the following answer to a problem: 12.655 cm. You are asked to round your answer to four significant figures. Which answer is correct? a) 12.66 cm b) 12.65 cm c) 12.60 cm d) 12.70 cm

a

Which is an element? a) salt b) brass c) aluminum

c

Which is vapor? a) gold b) methane c) steam d) sterling silver

c

If two measurements are very close to each other, then they are a) accurate b) precise c) both accurate and precise d) accepted values

b

Which group of elements are the most important for living organisms? a) carbon, lead, and tin b) carbon, nitrogen, and oxygen c) boron, aluminum, and nitrogen d) arsenic, antimony, and oxygen

b

Which is a gas? a) gold b) methane c) steam d) sterling silver

b

Which is a homogeneous mixture? a) silicon b) air c) nickel

b

Which of the following is a characteristic common to the transition metals? a) many are soft and easily cut with a knife b) most are good conductors of electricity and heat c) most react readily with the oxygen in air and must be stored under oil d) most form only one common ion

b

Which of the following statements does NOT describe the alkali metals? a) most are shiny gray solids that are very soft b) they easily gain an electron to form ions with a charge of -1 c) they are not found uncombined in nature d) they react with water to form alkaline solutions

b

You calculate that 213,000 m/s is the answer to a problem. What can you conclude about your answer? a) it has six significant figures b) it has three significant figures c) it's not possible to know how many significant figures are in an answer without knowing its accepted value d) it is not possible to know how many significant figures are in an answer without knowing its percent error

b

Alkaline earth metals form ions with a a) +3 charge b) 1+ charge c) 2+ charge d) +2 charge

c

Elements in the same group have similar chemical properties because a) their atoms are about the same size b) they have a similar atomic mass c) they have the same number of valence electrons d) they have a diagonal relationship

c

Elements that are poor conductors of electricity and heat and that are brittle, dull looking solids are: a) metalloids b) metals c) nonmetals d) transition metals

c

Elements with a higher atomic number than uranium are a) always found combined in compounds b) found as uncombined elements c) not found in nature d) found both as uncombined elements and in compounds

c

Physical or Chemical: burning gasoline

c

Which of the following is most likely to produce data that are not precise? a) a balance that is not set to zero b) not reading a graduated cylinder at eye level c) altering the procedure during an experiment d) making the same error with each trial

c

Physical/intensive, physical/extensive, chemical: ability to burn

chemical

Physical/intensive, physical/extensive, chemical: tendency to rust

chemical

The final electron in inner transition metals enters the a) p sublevel b) s sublevel c) d sublevel d) f sublevel

d

When you calculate percent error, you can ignore the a) accepted values b) measured values c) experimental values d) plus and minus signs

d

Which is an alloy? a) gold b) methane c) steam d) sterling silver

d

You calculate that 215,000 g is the answer to a problem. You are asked to write your answer in scientific notation. What can you conclude about your answer? a) it has six significant figures b) you should round the 1 up to 2 because it is followed by a 5 c) the answer is too small to be written in scientific notation d) it has three significant figures

d

True or False: Alkali and alkaline earth metals are not reactive

false

True or False: Alkaline earth metals do not react with oxygen

false

True or False: In an answer that has four significant figures, two are estimated and two are known.

false

True or False: The liter is the base unit of density.

false

True or False: The number 1,234,000 in scientific notation is equal to 1.234X10 to the fifth.

false

True or False: an alloy is a compound of a metal and oxygen

false

True or False: an alpha particle consists of two protons and two electrons

false

True or False: an atom's nucleus contains its protons and electrons

false

True or False: beta particles have a charge of 2+

false

True or False: the order of reactivity of the alkaline earth metals, from most to least reactive is beryllium, magnesium, calcium, strontium, and barium

false

Homo or Hetero: blood

hetero

Homo or Hetero: chunky peanut butter

hetero

Homo or Hetero: granite

hetero

Homo or Hetero: oil and water

hetero