CHEMISTRY: Inside the Atom Review 2013 - 2014

Time Frame: 5 mins
Source: http://www.avon-chemistry.com/nuclear_practice.htm

Hi everyone! 
This is a quick test for chapters 4 and 5 of our textbook. Have fun!

MULTIPLE CHOICE:

1. 1.      Cathode rays are:

A

negatively charged particles

B

positively charged particles

C

nuclei of a helium atom

D

fast moving neutrons

1. 2.     The neutral atoms of all of the isotopes of the same element have:

A

the same mass numbers

B

equal numbers of neutrons

C

the same number of electrons

D

different number of protons

1. 3.      Which statement is true about an isotope?

A

There can be more than one type of isotope for an element.

B

All isotopes for an element has the same number of protons and the same mass number.

C

Isotopes can have different numbers of protons.

D

All isotopes are not radioactive.

1. 4.      How many electrons are in an oxygen atom?

A

2

B

6

C

8

D

10

1. 5.  Copper has an atomic mass of 63.5 amu. Why is the atomic mass NOT a whole number?

A

All copper atoms have identical chemical properties.

B

The fractional number results from the fact that protons and neutrons have different masses.

C

Every copper atom has an atomic mass of 63.5 amu.

D

There are at least two naturally occurring isotopes of copper.

1. 6.      Which symbol represents an atom that contains the largest number of neutrons?

 

A

U-235

B

Pa-231

C

Np-239

D

Pu-240

E

U-239

7. The number of protons in fluorine-23 is 

A

6

B

8

C

9

D

14

E

23

8. Find the average mass of an element if the relative amounts are as follows:
   Isotopic Mass: Percentage:
   75 amu ----------- 2.3%
   77 amu ----------- 15.7 %
   78 amu ----------- 4.5 %
   80 amu ----------- 7.1 %
   81 amu ----------- 70.4 % 

A

77.25 amu

B

78.01 amu

C

79.09 amu

D

80.03 amu

E

81.09 amu

9. Which of the following is NOT true about chemical reactions? 

A

After a chemical reaction, the protons and neutrons within the atom have not changed.

B

After a chemical reaction, there are new bonds formed while others bonds were broken.

C

After a chemical reaction, an electron may enter the nucleus and change a proton to a neutron.

D

After a chemical reaction, the boiling points and melting points of the new products are different.

10. How many protons, neutrons, and electrons are in one atom of Pb-212 (atomic number 82)?

A

212 p+, 82 n0, 212 e-

B

82 p+, 212 n0, 212 e-

C

82 p+, 212 n0, 82 e-

D

82 p+, 82 n0, 212 e-

E

none of the above are correct

Did you have fun? Here are the answers!

1. a

2. c

3. a

4. c

5. d

6. e

7. d

8. d

9. c

10. e

CHEMISTRY 1ST QUARTER SCOPE AND SEQUENCE 2013-2014

UNIT 1: INTRODUCTION TO CHEMISTRY

Content Standard:

The learner demonstrates understanding of the value of scientific methods when internalized as a process

Performance Standard:

Learners, working in groups, perform problem-based scientific investigation resulting from understanding on the methods of chemistry

  Performance Task:

Conduct of scientific investigation to solve real world problems (observation)

     Topics:

Laboratory Apparatus and Safety

The Bunsen Burner

Scientific Inquiry

Observation and Inference

Asking Questions that Lead to Investigations

Parts of the Research Paper Formulating Hypothesis

Dependent, Independent, and Control Variables

Designing a Procedure to Test Hypotheses

Implementation of the Experimental Design

Collecting and Organizing Data

Accuracy and Uncertainty of Measurements

Units of Measurement (Prefixes used in SI)

Significant Figures

Scientific Notation

Measuring Length, Masses, Temperature and Time

Conversion of Units

Analysis and Interpretation of Data

Making Conclusions and Recommendations Writing the Abstract

UNIT 2: ATOMIC STRUCTURE

Content Standard:

The learner demonstrates understanding of the structure of the atoms in determining their properties, uses, and their benefits to one’s health, industry, and environment.

                                 Performance Standard:

Learners, individually or in groups, participate actively in constructing atomic models that explain the properties of elements and their uses.

   Performance Task:

Active involvement in constructing atomic structure models showing the properties of the elements and explaining their uses.

  Topics:

Sub-atomic  particles

Nuclear model of the atom

Atomic number, mass number, isotopes

Bohr Model of the Atom

Quantum Theory and Quantum Numbers

Electronic structure (shell model and orbitals; valence electrons).

Electron configuration