HCC CHEM1305 2021 January Chapter 4 Homework Assignment Latest

CHEM1305 Introductory Chemistry

Chapter 4 Homework Assignment  

Question 1Which of the following scientists proposed the first Atomic Theory?

  J. J. Thomson

  Ernest Rutherford

  John Dalton

  James Chadwick

 Question 2Match the following information about the subatomic particles:

relative mass is 0.00055

electron

relative charge is +1

proton

location is inside nucleus

neutrons and protons

Other Incorrect Match Options:

neutrons and electrons

 Question 3Refer to the periodic table (https://ptable.com/ (Links to an external site.)) and type in the number of protons each of the following elements have in their nucleus:

silver, Ag  47

xenon, Xe  54

potassium, K  19

copper, Cu  29

nitrogen, N  7

Question 4Choose the correct atomic notation for an atom of cobalt with 32 neutrons in its nucleus.

  co3.png

  co2.png

  co1.png

  co4.png

 Question 5What is the term for atoms of the same element that have different numbers of neutrons.

  nucleotides

  atomic notation

  protons

  isotopes

 Question 6Type in the number of neutrons in each of the following isotopes of tungsten, W:

W-182 

108

W-186 

112

Question 7Fill in the following table (assume the atoms are neutral):

Isotope                Number of Protons         Number of Neutrons     Number of Electrons

Os-192 

76

116

76

Al-27

13           14          

13

Question 8Chlorine has two naturally occurring isotopes: Cl-35 with mass 34.969 amu and a natural abundance of 75.78%, and Cl-37 with mass 36.966 amu and a natural abundance of 24.22%. What is the calculated atomic mass of chlorine?

  36 amu

  3545 amu

  35.45

  35.45 amu

 Question 9Type in how many electrons can each of the following sublevels hold:

s 

2

p 

6

d 

10

f 

14

Question 10Electrons will occupy sublevels in order of increasing…

  energy

  mass

  time

  sound