Determine the atomic mass of a hypothetical element that occurs on Earth as a mixture of 30.00 44X (atomic mass of isotope = 44.00 u) and 70.00 46X (atomic mass of isotope = 46.00 u).
[Ques. 2] Which of the following is formed by direct freezing of water droplets?
a. Dew
b. Snow
c. Sleet
d. Frost
[Ques. 3] Determine the atomic mass of a hypothetical element that occurs on Earth as a mixture of 20.00 32X (atomic mass of isotope = 32.00 u) and 80.00 34X (atomic mass of isotope = 34.00 u).
[Ques. 4] When the dew point is below 0C, which of the following is likely to form?
a. Sleet
b. Snow
c. Hail
d. Dew
[Ques. 5] The percentage of a radionuclide that would remain after 4 half-lives is ______________.
Fill in the blank(s) with correct word
[Ques. 6] A form of precipitation that results from convection cycles in clouds is
a. sleet.
b. rain.
c. hail.
d. fog.
[Ques. 7] A positron is the ______________of an electron.
Fill in the blank(s) with correct word
[Ques. 8] For water droplets to form, what must be present?
a. Smog
b. Hygroscopic nuclei
c. Carbon dioxide
d. Ozone
[Ques. 9] The number of nucleons in a nucleus is the same as the number of neutrons plus the number of ______________.
Fill in the blank(s) with correct word
[Ques. 10] During the approach of a severe thunderstorm, workers on a project see lightning and then hear the resulting thunder 55 s later. Approximately how far away, in miles, is the storm?
a. 11 mi
b. 22 mi
c. 12 mi
d. 13 mi