Question 1

A sample of silicon rejected for use in an electronic circuit has an impurity of boron at a level of 3 parts per trillion.What is the fraction of boron atoms in the silicon sample as written in scientific notation?

Accepted Answer

A)  3 x 10-9
B)  3 x 109
C)  3 x 10-12
D)  3 x 106 A

Question 2

What is the answer to the following mathematical operation? 1.42 + 9.4 x 2.854

Accepted Answer

A)  30.8
B)  30.82
C)  30.88028
D)  31 A

Question 3

Which substance is an element?

Accepted Answer

A)  NO2
B)  NaCl
C)  N2
D)  CH4 C

Question 4

The majority of new smartphones being released have displays that are at least 5 inches in size.What is this size in centimeters? (There are 2.54 cm in one inch. )

Accepted Answer

A)  1.97 cm
B)  6.10 cm
C)  12.7 cm
D)  60.0 cm

Question 5

Which corresponds to the composition of the ion typically formed by fluorine?

Accepted Answer

A)  A
B)  B
C)  C
D)  D

Question 6

Which square(s) contain(s) only an element?

Accepted Answer

A)  I only
B)  II only
C)  I and II only
D)  III and IV only

Question 7

What type of material is defined as having a well-ordered atomic structure?

Accepted Answer

A)  Amorphous
B)  Crystalline
C)  Transparent
D)  Opaque

Question 8

What is the term used to describe a material that allows light to mostly pass through it?

Accepted Answer

A)  Reflective
B)  Porous
C)  Transparent
D)  Absorbtive

Question 9

Which one of the following compounds is considered to be a molecular compound?

Accepted Answer

A)  PCl3
B)  NaBr
C)  Al2O3
D)  Mg3P2

Question 10

Which one of the following is a subatomic particle located in the center of the atom and has a positive charge?

Accepted Answer

A)  Protons
B)  Neutrons
C)  Electrons
D)  Photons

Question 11

A recent set of advertisements has a picture of an aluminum can with an aluminum-frame bicycle,along with a hypothetical quote from the can that reads: "I want to be a bike.Recycle me." The analysis of the life cycle of an item starting with its raw materials and ending with the used item becoming the raw material for new products is called

Accepted Answer

A)  cradle-to-grave.
B)  reusability.
C)  cradle-to-cradle.
D)  cost-benefit analysis.

Question 12

Which one of these materials is most likely to conduct heat?

Accepted Answer

A)  A titanium rod
B)  A sample of chlorine gas
C)  A silicon wafer
D)  A chunk of phosphorus

Question 13

A substance that can be broken down into two or more simpler substances by chemical methods is called a(n)

Accepted Answer

A)  compound.
B)  mixture.
C)  element.
D)  isotope.

Question 14

The quantity 8.7 × 105 g expressed in standard decimal notation.

Accepted Answer

A)  0.000087 g
B)  870.000 g
C)  0.0000087 g
D)  870,000 g

Question 15

On a Periodic Table,the columns of elements with similar properties are

Accepted Answer

A)  periods.
B)  groups.
C)  rows.
D)  metals.

Question 16

One of the lightest smartphones on the market today weighs 113 g.To protect your phone,you may want to use a screen protector,which weighs 27.2 g,and a heavy duty phone case,which weighs 114 g.What is the total weight of the phone,screen protector,and case?

Accepted Answer

A)  254.20 g
B)  254.2 g
C)  254 g
D)  250 g

Question 17

Which differentiates a compound from a mixture of two or more elements?

Accepted Answer

A)  The elements in a compound may be present in varying proportions
B)  A compound does not exhibit the individual properties of the elements of which it is composed
C)  A compound is made up of only one element
D)  A compound cannot be made up of more than two elements

Question 18

Which symbol(s) represent(s) elements in the noble gas family?

Accepted Answer

A)  X and Z
B)  P and L
C)  Q
D)  Y

Question 19

The most numerous of the elements are the

Accepted Answer

A)  metals.
B)  nonmetals.
C)  metalloids.
D)  noble gases.

Question 20

Which squares contain mixtures?

Accepted Answer

A)  II and III only
B)  III and IV only
C)  I,III,and IV only
D)  I and IV only

Exam 1: Portable Electronics: the Periodic Table in the Palm of Your Hand