Atomic Structure Practice Test - My eCoach




Loading...







atomic structure practice test

atomic structure practice test www wappingersschools org/cms/lib/NY01001463/Centricity/Domain/1471/Atomic 20Structure 20Practice 20Test 20answer 20key pdf Which two particles each have a mass approximately equal to one atomic mass unit? A) An atom is mostly empty space with a dense, positively charged nucleus B)

Atomic Structure Practice Test 1pdf - School District of Clayton

Atomic Structure Practice Test 1 pdf - School District of Clayton www claytonschools net/site/handlers/filedownload ashx?moduleinstanceid=4203&dataid=41680&FileName=Atomic 20Structure 20Practice 20Test 201 pdf ATOMIC STRUCTURE PRACTICE TEST #1 1 A sample of gas is electrically c trends reoccur so that groups of elements share the similar chemical properties

Atomic Structure Practice Test - My eCoach

Atomic Structure Practice Test - My eCoach my-ecoach com/online/resources/3709/atomic_structure_practice_test1 pdf Atoms cannot be divided, created, or destroyed b The number of protons in an atom is its atomic number c In chemical reactions, atoms are combined,

Unit 1: Chemistry REVIEW “Practice Test”

Unit 1: Chemistry REVIEW “Practice Test” misszukowski weebly com/uploads/9/7/4/6/97462532/chapter_4_practice_test__new__key pdf Write the name of the Atom shown in each Bohr Diagram in the box below: 17 Identify the number of electrons in the valence shell of the following atoms

Chem 100 Exam II (Practice Test)

Chem 100 Exam II (Practice Test) www cerritos edu/chemistry/chem_100/Practice_Exams/100exam2PracF03 pdf The symbol of this particle is p+ or H For the following element, 30Zn64 answer the following questions related to the configuration 1 The atom contains the

ATOMIC STRUCTURE PAST PAPER QUESTIONS

ATOMIC STRUCTURE PAST PAPER QUESTIONS www scienceexamssorted co uk/wp-content/uploads/2020/09/2 -Atomic-structure-past-paper-questions pdf Science Exams Sorted 2020 www scienceexamssorted co uk All atoms of element E in this sample contain What is the chemical symbol of this non-metal?

ANSWERS- Ch 3 Practice Test - muncysdorg

ANSWERS- Ch 3 Practice Test - muncysd org www muncysd org/cms/lib/PA06000076/Centricity/Domain/92/Practice_test_answers_for_Chapter_3 pdf Neutral atoms of the same element can differ in a chemical properties b mass number :: c atomic number

Practice Test Chs 1 & 2

Practice Test Chs 1 & 2 ap kmacgill com/wp-content/uploads/2012/09/ch_01_02_prac_test pdf Practice Test Chs 1 & 2: Chemical Foundations and Atoms, Formulas & Ions Name___________________________________ MULTIPLE CHOICE

Name_____________________

Name_____________________ www colby edu/chemistry/CH112/Exams/Sample1-KEY pdf Answers to Sample Exam Questions #1 b) Atoms of the same element can be different d) A chemical reaction involves rearrangement of atoms

CH 3_QUIZZES for Sections 1-2-3pdf - Kenilworth Public Schools

CH 3_QUIZZES for Sections 1-2-3 pdf - Kenilworth Public Schools www kenilworthschools com/UserFiles/Servers/Server_7985/File/Mr 20Novak's 20Chemistry/CH 203_QUIZZES 20for 20Sections 201-2-3 pdf QUIZ Assessment CH#3 Atoms: The Building Blocks of Matter QUIZ CH #3 - Seet #1 The fact that every sample of a particular chemical compound

Atomic Structure Practice Test - My eCoach 44920_7atomic_structure_practice_test1.pdf

Atomic Structure Practice Test

Multiple Choice Identify the choice that best completes the statement or answers the question.

____ 1. If 6.0 g of element K combine with 17 g of element L, how many grams of element K combine with 85 g of

element L? a. 17 g b. 23 g c. 30. g d. 91 g ____ 2. Which of the following is not part of Dalton's atomic theory? a. Atoms cannot be divided, created, or destroyed. b. The number of protons in an atom is its atomic number. c. In chemical reactions, atoms are combined, separated, or rearranged. d. All matter is composed of extremely small particles called atoms. ____ 3. Dalton's atomic theory agrees with modern atomic theory except for the statement that a. all matter is made up of small particles. b. atoms are not divided in chemical reactions. c. atoms of the same element are chemically alike. d. all atoms of the same element have the same mass. ____ 4. The rays produced in a cathode tube are a. unaffected by a magnetic field. c. found to carry a positive charge. b. deflected away from a negative plate. d. striking the cathode.

____ 5. After measuring the ratio of the charge of a cathode-ray particle to its mass, Thomson concluded that the

particles a. had no mass. c. had a very large mass. b. had a very small mass. d. carried a positive charge. ____ 6. Whose series of experiments identified the nucleus of the atom? a. Rutherford b. Dalton c. Chadwick d. Bohr

____ 7. Because most particles fired at metal foil passed straight through, Rutherford concluded that

a. atoms were mostly empty space. c. electrons formed the nucleus. b. atoms contained no charged particles. d. atoms were indivisible.

____ 8. A nuclear particle that has about the same mass as a proton, but with no electrical charge, is called a(n)

a. nuclide. b. neutron. c. electron. d. isotope.

____ 9. Which part of an atom has a mass approximately equal to 1/2000 of the mass of a proton or a neutron?

a. nucleus b. electron c. proton d. neutron

____ 10. The smallest unit of an element that can exist either alone or in combination with other such particles of the

same or different elements is the a. electron. b. proton. c. neutron. d. atom. ____ 11. The atomic number of oxygen, 8, indicates that there are eight a. protons in the nucleus. c. neutrons outside the nucleus. b. oxygen nuclides. d. energy levels in the nucleus. ____ 12. The total number of protons and neutrons in the nucleus of an atom is its a. atomic number. b. atomic weight. c. mass number. d. atomic mass. ____ 13. a. decreases. b. increases. c. remains the same. d. doubles each time the mass number increases. ____ 14. All atoms of the same element have the same a. atomic mass. b. # of neutrons. c. mass number. d. atomic number. ____ 15. The average atomic mass of an element a. is the mass of the most abundant isotope. c. cannot be calculated. b. may not equal the mass of any isotopes. d. always adds up to 100.

____ 16. An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. Its mass number is

a. 13. b. 14. c. 27. d. 40. ____ 17. Carbon-14 (atomic number 6), the radioactive nuclide used in dating fossils, has a. 6 neutrons. b. 8 neutrons. c. 10 neutrons. d. 14 neutrons. ____ 18. Phosphorus-33 (atomic number 15) contains a. 33 protons. b. 18 neutrons. c. 33 neutrons. d. 18 protons.

Short Answer

19. What is the law of conservation of mass? 20. Describe the nucleus of an atom. 21. Give the location and relative charge of a proton.
22. What is the atomic number of an atom?
23. What is the mass number of an atom?
24. What is the relationship between isotopes, mass number, and neutrons?

Essay

25. Why do scientists use Dalton's theory, even though parts of it have been proven wrong? How much of

Dalton's theory do scientists still accept?

26. What can you determine about the atomic structure of an element if you know the atomic number of the

element and mass numbers of its isotopes? What additional information is needed to determine the average

atomic mass of the element? How do you determine the average atomic mass of the element? 27. Unknownium has two common isotopes, uknownium- 85 and unknownium-87. The abundance of 85Uk is

72.2% and its mass is 84.96 amu. The abundance of 87Uk is 27.8%, and its mass is 86.976 amu. What is

the average atomic mass of unknownium?

What element is unknownium?

Atomic Structure Practice Test

Answer Section

MULTIPLE CHOICE

1. ANS: C

Solution:

PTS: 1 DIF: III REF: 1 OBJ: 1

STA: SC.B.1.4.2

2. ANS: B PTS: 1 DIF: I REF: 1

OBJ: 2

3. ANS: B PTS: 1 DIF: I REF: 1

OBJ: 2

4. ANS: B PTS: 1 DIF: I REF: 2

OBJ: 1 STA: SC.A.2.4.1

5. ANS: B PTS: 1 DIF: I REF: 2

OBJ: 1 STA: SC.A.2.4.1

6. ANS: A PTS: 1 DIF: I REF: 2

OBJ: 2 STA: SC.A.2.4.1

7. ANS: A PTS: 1 DIF: II REF: 2

OBJ: 2 STA: SC.A.2.4.1

8. ANS: B PTS: 1 DIF: I REF: 2

OBJ: 3 STA: SC.C.2.4.2

9. ANS: B PTS: 1 DIF: I REF: 2

OBJ: 3 STA: SC.C.2.4.2

10. ANS: D PTS: 1 DIF: I REF: 2

OBJ: 4 STA: SC.A.2.4.2

11. ANS: A PTS: 1 DIF: II REF: 3

OBJ: 2 STA: SC.A.2.4.3

12. ANS: C PTS: 1 DIF: I REF: 3

OBJ: 2 STA: SC.A.2.4.3

13. ANS: C PTS: 1 DIF: I REF: 3

OBJ: 2 STA: SC.A.2.4.3

14. ANS: D PTS: 1 DIF: I REF: 3

OBJ: 2 STA: SC.A.2.4.3

15. ANS: B PTS: 1 DIF: I REF: 3

OBJ: 2 STA: SC.A.2.4.3

16. ANS: C PTS: 1 DIF: III REF: 3

OBJ: 3 STA: SC.A.2.4.1

17. ANS: B PTS: 1 DIF: III REF: 3

OBJ: 3 STA: SC.A.2.4.1

18. ANS: B PTS: 1 DIF: III REF: 3

OBJ: 3 STA: SC.A.2.4.1

SHORT ANSWER

19. ANS: The statement that mass cannot be created or destroyed in ordinary chemical reactions.

PTS: 1 DIF: I REF: 1 OBJ: 1

STA: SC.B.1.4.2

20. ANS: ade up of protons and neutrons.

PTS: 1 DIF: I REF: 2 OBJ: 2

STA: SC.A.2.4.1

21. ANS:
A proton is a subatomic particle with a positive charge that is located in the nucleus of an atom.

PTS: 1 DIF: I REF: 2 OBJ: 3

STA: SC.C.2.4.2

22. ANS:

The number of protons in the nucleus of an atom.

PTS: 1 DIF: I REF: 3 OBJ: 1

STA: SC.A.2.4.3

23. ANS:
The sum of the number of protons and neutrons in an atom.

PTS: 1 DIF: I REF: 3 OBJ: 1

STA: SC.A.2.4.3

24. ANS:

Isotopes are atoms of the same element with different numbers of neutrons, and therefore, different mass

numbers.

PTS: 1 DIF: II REF: 3 OBJ: 2

STA: SC.A.2.4.3

ESSAY

25. ANS:

Dalton's theory led to the modern theory of the atom. Although scientists now know that atoms can be divided

and that elements exist as isotopes, most of his early theory is still accepted.

PTS: 1 DIF: II REF: 1 OBJ: 3

STA: SC.B.1.4.2

26. ANS:

The atomic number equals the number of protons in the nucleus of an atom and also equals the number of

electrons in the neutral atom. The mass number is the sum of the number of protons and neutrons and can be

used, with the atomic number, to find the number of neutrons in each isotope. Each isotope of the element has

a different mass number but the same atomic number as the element. In order to determine the average atomic mass of the element, you needed to know the relative

abundance and the exact mass of each isotope. Then, multiply the relative abundance (in decimal form) times

the atomic mass for each isotope, and adding the results.

PTS: 1 DIF: II REF: 3 OBJ: 2

STA: SC.A.2.4.3

27. ANS:
unknownium-85 84.96 amu x 0.722 = 61.34112 unknownium-87 86.976 amu x 0.278 = 24.179328 ATOMIC MASS =85.520448 amu = 85.52 amu

PTS: 1


Politique de confidentialité -Privacy policy