AnswersMadison 2017 Phy Sci A-35 SSChemical Bonding

Chemical Bonding — Cumulative exam Answers

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What is one purpose for the peer-review process in scientific research?

A
to make scientific research progress more quickly
B
to verify that the conclusions are supported by the data
C
to allow anyone to submit their research to scientific journals
D
to ensure that only established tools and techniques are used
22
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Which statement best explains how the mass of an atom is organized?

A
Most of the mass is contained in the nucleus.
B
The mass is spread evenly throughout the whole atom.
C
The mass is spread evenly throughout the electron cloud.
D
Most of the mass is contained in the electron cloud.
23

Lucy is supposed to write down the lengths of 10 earthworms found near the playground at her school. She measures the earthworms’ lengths in millimeters, but she accidentally labels her data in centimeters.Which best describes this error in data collection?

A
The data are inadequate.
B
The data are false.
C
The data are recorded incorrectly.
D
The data cannot be reproduced.
24

In an investigation, the atoms of a certain substance lose energy during a change of state. Before the change, the atoms are far apart and move constantly at high speeds and in all directions. After the change, the atoms are close together but are able to slide past one another.Use the diagram that shows changes of state between solid, liquid, and gas to answer the question.

Question illustration
A
L
B
N
C
O
D
P
25

Which best compares and contrasts how John Newlands and Dmitri Mendeleev organized elements?

A
Both Newlands and Mendeleev arranged elements according to their chemical properties, but only Newlands used atomic mass as well.
B
Both Newlands and Mendeleev arranged elements according to their atomic masses, but only Mendeleev used chemical properties as well.
C
Both Newlands and Mendeleev organized elements into groups, but only Newlands used a table with rows and columns.
D
Both Newlands and Mendeleev organized elements into a table with rows and columns, but only Mendeleev named different groups of elements.
26

Read the passage.In Federal Drug Administration clinical trials, people who added a particular drug to diet and exercise were able to lose weight, as well as lower their blood pressure. This drug was evaluated in two clinical studies involving overweight adults with high blood pressure. The results of the trials showed that 48 percent of people taking this drug lost some of their body weight. The other group in this trial consisted of people who were not taking this medicine, and only 23 percent of them lost some weight.

A
Exercise and diet help people lose more weight than with the aid of this drug.
B
This drug helps people lose more weight than diet and exercise alone.
C
Overweight adults have always had high blood pressure.
D
This drug won’t help people lower their blood pressure if they already exercise.
27

Assuming the bull’s eye is the accepted value, which diagram shows results that are accurate and precise?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
28

How would an electron shell model of an oxygen atom (O) appear after the atom has formed chemical bonds?

A
It would have six electrons in the outermost shell.
B
It would have six electrons in the innermost shell.
C
It would have eight electrons in the outermost shell.
D
It would have eight electrons in the innermost shell.
29

What did Thomson’s model of the atom include that Dalton’s model did not have?

A
a nucleus
B
energy levels
C
electron clouds
D
smaller particles
30

Juliana was late to physical science class and missed the beginning of the notes, including the title. These are the notes she took.-Makes up everything -Can be solid, liquid, or gas -Is made up of atoms, or tiny particles that are the smallest unit of matterWhat would be the best title for her notes?

A
Atoms
B
Matter
C
Mass
D
Weight
31

Alai records data about making a mixture of salt and water. Which best explains why Alai’s salt measurement is wrong?

Question illustration
A
It should be recorded in milligrams.
B
It should be recorded in millimeters.
C
It should be recorded in centiliters.
D
It should be recorded in centimeters.
32

Which has most likely been peer reviewed?

A
an article on the benefits of eating cheese, featured in Crosscreek Dairy Monthly magazine
B
an article on the benefits of wearing shoe inserts, featured in Bob’s Footwear circular
C
an article on the beneficial bacteria in yogurt, featured in Medical Journal of Gastroenterology
D
an article on beneficial face creams, featured in Beauty and You magazine
33

Sonya reads the element riddle below.I am shiny. I form +1 ions. There’s more!I am the most reactive metal in Period 4. Who am I?Which element is the answer to the riddle?

A
krypton
B
potassium
C
sodium
D
bromine
34

Which element is a halogen?

A
chlorine (Cl)
B
oxygen (O)
C
carbon (C)
D
radon (Rn)
35

Lava is rock that has undergone a physical change and has liquefied. What is known about this change?

A
The lava gained mass.
B
The lava was burned into smoke.
C
The lava can cool back into rock.
D
The lava lost mass.
36

A sample of a solid nonmetal is compared to a sample of a solid metal. Both samples have the same volume. What is the most likely difference between the two samples?

A
The nonmetal has more mass.
B
The nonmetal takes up more space.
C
The metal has more mass.
D
The metal takes up more space.
37

Which best describes a semiconductor?

A
Semiconductors are more conductive than a nonmetal and less conductive than a metal.
B
Semiconductors are more conductive than a nonmetal and less conductive than a metalloid.
C
Semiconductors have a high electrical conductivity.
D
Semiconductors have a no electrical conductivity.
38

Why are scientists most likely working on developing cleaner-burning fuel for cars?

A
to increase fuel consumption
B
to increase fuel production
C
to reduce noise pollution
D
to reduce air pollution
39

The picture shows a student working in the lab.

Question illustration
A
one
B
two
C
three
D
four
40

Miles mixed two unlabeled solutions together. This caused a bad reaction, and a noxious gas was emitted. Which describes what Miles should do?

A
He should use a fire blanket to cover his solutions.
B
He should report the accident and leave the area.
C
He should neutralize the reaction by adding water.
D
He should pour the solution down the sink to stop the gas.

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