Homework answers / question archive / Independence University CHEMISTRY 101 Assignment 3 1)Write the following isotope in hyphenated form (e

Independence University CHEMISTRY 101 Assignment 3 1)Write the following isotope in hyphenated form (e

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Independence University

CHEMISTRY 101

Assignment 3

1)Write the following isotope in hyphenated form (e.g., “carbon-14”): 11

a.            sodium-24

b.            sodium -11

c.             sodium -35

d.            sodium -13

 

29

2.            Write the following isotope in hyphenated form (e.g., “carbon-14”): 13

a.            Aluminum-16

b.            Aluminum -13

c.             Aluminum -29

d.            Aluminum -42

 

73

3.            Write the following isotope in hyphenated form (e.g., “carbon-14”): 36

a.            Krypton-109

b.            Krypton -37

c.             Krypton -36

d.            Krypton -73

 

 

4.            Write the following isotope in hyphenated form (e.g., “carbon-14”): a. iridium-194

b.            iridium-77

c.             iridium-271

d.            iridium-117

 

194

77

 

 

 

14

5.            Write the following isotope in nuclide notation (e.g., “ 6

a.            16 O

b.            17 O

c.             14 O

d.            157O

 

”): oxygen-14

 

 

 

14

6.            Write the following isotope in nuclide notation (e.g., “ 6

a.            63 Cu

b.            70    Cu

c.             29 Cu

d.            2970Cu

 

”): copper-70

 

 

 

14

7.            Write the following isotope in nuclide notation (e.g., “ 6

a.            181 Ta

b. 73181Ta

c. 73       Ta

d. 175 Ta

 

”): tantalum-175

 

 

 

14

8.            Write the following isotope in nuclide notation (e.g., “ 6

a.            217 Fr

b.            87           Fr

c.             231 Fr

d.            87           Fr

 

”): francium-217

 

 

9.            For the following isotopes that have missing information, fill in the missing information to

34

complete the notation: 14

a.            3414 Si

b.            34 Se

c.             34 S

d.            34 P

 

10.          For the following isotopes that have missing information, fill in the missing information to

36 P

complete the notation: X

a. 3515 P

b. 3614 P

c. 34 P

d. 3615 P

 

11.          For the following isotopes that have missing information, fill in the missing information to

57 Mn

complete the notation: X

a.            57 Mn

 

b.            5742 Mn

c.             57  Mn

d.            57 Mn

 

12.          For the following isotopes that have missing information, fill in the missing information to

121 X

complete the notation: 56

a. 121 Cs

b. 12156 Ba

c. 121 Xe

d. 12156 I

 

7 Li  +  ?  − −?   24 He

13.          Complete the following equation: 3        2

a.            1 p

b.            0 e

c.             4 He

d.            1 n

 

14 C  − −?   14 N  +  ?

14.          Complete the following equation: 6        7

a.            1 p

b.            0 e

c.             4 He

d.            1 n

 

 

15.          Complete the following equation: 27 Al +

 

4 He

 

− −?   ?  +   1n

 

a.            31 P

b.            30 P

c.             31 S

d.            32    S

 

13           2              0

 

 

 

250 Cm

 

− −?

 

? +  98Sr +

 

4 1n

 

16.          Complete the following equation:

a.            148 Pr

b.            155 Pr

c.             150 Ce

d.            148    Ce

 

96           38           0

 

 

 

17.          An alpha particle is not represented by which of the following symbols:

 

a.            α

b.            42 He

c.             42 α

d.            11 p

 

18.          Which of the following symbols represents a neutron in nuclear chemistry?

a.            1 p

b.            0 e

c.             4 He

d.            1 n

 

19.          Which of the following symbols represents a beta particle in nuclear chemistry?

a.            1 p

b.            0   e

c.             4 He

d.            1 n

 

20.          Which of the following symbols represents a gamma particle in nuclear chemistry?

a.            γ

b.            0 e

c.             4 He

d.            1 n

 

21.          What changes occur to the atomic number and mass of a nucleus during each of the following decay scenarios: α particle is emitted

a.            The atomic number decreases by two and the mass number decrease by four

b.            The atomic number increases by one and the mass number remains unchanged

c.             The atomic number and mass number remain unchanged.

d.            The atomic number decreases by one and the mass number remains unchanged

e.            The atomic number decrease by one and the mass number remains unchanged.

 

22.          What changes occur to the atomic number and mass of a nucleus during each of the following decay scenarios: a β particle is emitted

a.            The atomic number decreases by two and the mass number decrease by four

b.            The atomic number increases by one and the mass number remains unchanged

c.             The atomic number and mass number remain unchanged.

d.            The atomic number decreases by one and the mass number remains unchanged

e.            The atomic number decrease by one and the mass number remains unchanged.

 

23.          What changes occur to the atomic number and mass of a nucleus during each of the following decay scenarios: γ radiation is emitted

a.            The atomic number decreases by two and the mass number decrease by four

b.            The atomic number increases by one and the mass number remains unchanged

c.             The atomic number and mass number remain unchanged.

d.            The atomic number decreases by one and the mass number remains unchanged

e.            The atomic number decrease by one and the mass number remains unchanged.

 

24.          What changes occur to the atomic number and mass of a nucleus during each of the following decay scenarios: a positron is emitted

a.            The atomic number decreases by two and the mass number decrease by four

b.            The atomic number increases by one and the mass number remains unchanged

 

c.             The atomic number and mass number remain unchanged.

d.            The atomic number decreases by one and the mass number remains unchanged

e.            The atomic number decrease by one and the mass number remains unchanged.

 

 

25.          What changes occur to the atomic number and mass of a nucleus during each of the following decay scenarios: an electron is captured

 

(a)          The atomic number decreases by two and the mass number decreases by four.

(b)          The atomic number increases by one and the mass number remains unchanged.

(c)           The atomic number and mass number remain unchanged.

(d)          The atomic number decreases by one and mass number remains unchanged.

(e)          The atomic number decreases by one and the mass number remains unchanged.

 

26.          239Pu is a nuclear waste byproduct with a half-life of 24,000 y. What fraction of the 239Pu present today will be present in 1000 y?

a. 50%

b. 92%

c. 97%

d. 86%

 

27.          Calculate the molecular or formula mass for P4

a.            60amu

b.            124amu

c.             150 amu d 225 amu

 

 

28.          Calculate the molecular or formula mass for H2O

a.            18amu

b.            20amu

c.             33 amu

d.            10 amu

 

29.          Calculate the molecular or formula mass for Ca(NO3)2

 

a.            116amu

b.            102amu

c.             82 amu

d.            164 amu

 

30.          Calculate the molecular or formula mass for CH3CO2H (acetic acid)

 

a.            105amu

b.            32amu

c.             60amu

 

d.            8amu

 

31.          Calculate the molecular or formula mass for C12H22O11 (sucrose, cane sugar)

 

a.            302amu

b.            182amu

c.             45amu

d.            342amu

 

32.          Determine the mass in grams of 0.600 mol of oxygen atoms ( grams x1mole/(mass of element)

a. 9.60g

b. 4.8g

c. 0.600g

d. 16g

 

33.          Determine the mass in grams of 0.600 mol of oxygen molecules, O2 (grams x1mole/(mass of molecule)

a. 19.2g

b. 32g

c. 0.600g

d. 16g

 

34.          Determine the mass in grams of 0.600 mol of ozone molecules, O3 (grams x1mole/(mass of molecule)

 

a. 48.0g b. 28.8g c. 0.600g

d. 16g

 

35.          Which type of radiation is most penetrating?

a.            alpha

b.            beta

c.             gamma

d.            they are equal