Chemistry, 01.01.2020 14:31 amiramoonbeam
Use the portion of the periodic table shown below to answer the questions.
part 1: name two elements that have the same properties as sodium (na). (4 points)
part 2: determine the number of protons, electrons, and neutrons present in an atom of calcium (ca). explain how you determined your answer using complete sentences. (6 points)
Answers: 2
Chemistry, 21.06.2019 16:50
What is the composition, in atom percent, of an alloy that consists of 4.5 wt% pb and 95.5 wt% sn? the atomic weights for pb and sn are 207.19 g/mol and 118.71 g/mol, respectively.(a) 2.6 at% pb and 97.4 at% sn(b) 7.6 at% pb and 92.4 at% sn(c)97.4 at% pb and 2.6 at% sn(d) 92.4 at% pb and 7.6 at% sn
Answers: 2
Chemistry, 22.06.2019 02:30
Which piece of equipment would me most useful for measuring the volume of some water? a. pan balance b. graduated cylinder c. tweezers d. flask quick
Answers: 2
Use the portion of the periodic table shown below to answer the questions.
part 1: name...
part 1: name...
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