CHAPTER THREE - ATOMIC STRUCTURE

 

Directions: Use this page as a review. For each of the 20 questions there is four or five answers, choose the correct answer and you get to move on to the next question. I know this won't happen, but if you choose the WRONG answer you will be taken to an explanation of why that answer is wrong and shown the correct answer (which will be in red), and then may be another question for you to answer.

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 #1. The elements of the periodic table are arranged according to their:

a. Atomic Number

b. Metallic character

c. Atomic Weight

d. Alphabetically

#2. The elements on the far right of the periodic table are:

a. Metalloids and very reactive

b. Metalloids and unreactive

c. Noble gases and very reactive

d. Noble gases and unreactive

#3. What is the chemical symbol for Potassium?

a. K

b. P

c. Po

d. Na

#4. Cl is the symbol for which element?

a. Carbon

b. Chlorine

c. Chromium

d. Californium

#5. Which law states that when two or more elements react to produce a compound, the total mass of the compound is the same as the sum of masses of the individual elements?

a. Law of definite composition

b. Law of multiple proportions

c. Law of atomic theory

d. Law of conservation of mass

#6. Based on the law of conservation of mass what would be the result of the following reaction?

H2 + O2 ----> ?

a. HO

b. H2O2

c. H2O4

d. H2O

#7. According to one of the principles of Dalton's atomic theory

a. Atoms of different elements combine in simple, whole-number ratios to form chemical compounds

b. Atoms of the same elements combine in simple, whole-number ratios to form chemical compounds

c. Atoms can be subdivided, created, or destroyed when they are combined separated, or rearranged in chemical reactions

d. Atoms of a given element are not identical in their physical and chemical properties.

#8. The deflection of cathode rays in Thomson's experiments gave evidence of the _________ nature of electrons.

a. Wave

b. Charged

c. Particle

d. Spinning

#9. The nucleus of an atom:

a. Contains very little of the mass of an atom

b. Occupies a large part of the volume of an atom

c. Contains protons, neutrons, and electrons

d. Contains only protons and neutrons

 

Refer to this picture for questions #10

#10. According to the quantum theory, point A in the above figure represents___________.

a. the fixed position of an electron

b. the farthest point from the nucleus that an electron can achieve

c. a position where an electron cannot exist

d. a position where an electron probably exists

#11. When energy is added to an atom, that atoms electrons are boosted to a higher energy level. They are said to be in the ____________ and the atom has _______________?

a. ground state, absorbed energy

b. excited state, absorbed energy

c. ground state, released energy

d. excited state, released energy

#12. The visible spectrum is located between the _________________ spectrum and the ____________ spectrum.

a. Gamma Ray, Ultraviolet

b. Ultraviolet, X ray

c. Ultraviolet, Infrared Heat Waves

d. Microwaves, FM radio waves

#13. The Heisenberg uncertainty principle says that you can know the _________________ of an electron.

a. Position and not they velocity

b. Velocity and not the position

c. Neither the velocity or the position

d. Either the velocity or the position

#14. Magnesium (Mg) with an atomic number of 12 and an atomic mass of 24 has _____________________ neutrons in the nucleus.

a. 8

b .12

c. 24

d. 36

Refer to the following picture for #15

 

 

 

 

 

 

 

 

#15. Which of the following lists correctly matches all of the orbitals with their corresponding shape from the above picture?

a. 1-pz / 2-s / 3-px / 4-dxz

b. 1-s / 2-dxz / 3-px / 4-py

c. 1-s / 2-dxz / 3-pz / 4-px

d. 1-dxz / 2-s / 3-px / 4-py

#16. Which of the following columns is correct?

a. Column A

s sublevel

b. Column B

p sublevel

c. Column C

d sublevel

d. Column D

f sublevel

l = 0

l = 1

l =2

l = 3

1 orbital

2 orbitals

4 orbitals

7 orbitals

Max. of 2 electrons

Max. of 6 electrons

Max of 10 electrons

Max of 16 electrons

 

#17. Hund's Rule is best represented by which of the following orbital diagrams?

a.

b.

c.

d.

 

#18. Which of the following is the correct electron configuration for Chlorine (Cl)?

a. 1s22s22p5

b. 1s22s22p63s13p5

c. 1s22s22p63s23p5

d. 1s22s23s22p63p5

#19. Which element has the following electron configuration? [Kr] 5s24d105p2?

a. In

b. Rb

c. Pb

d. Sn

#20. Which of the following orbitals has the most energy associated with it?

a. 3d

b. 3s

c. 3p

d. 4s

 

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