Chemistry, 18.12.2019 18:31 Softball6286
[03.01]victoria is studying the periodic table of elements and notices that several trends exist. which of the following statements could she correctly make regarding elements in the same group in the periodic table? a=they have similar names b= they have decreasing atomic mass c=they have similar chemical properties. d=they have the same number of protons.
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 13:30
Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?
Answers: 1
[03.01]victoria is studying the periodic table of elements and notices that several trends exist. wh...
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