Predict whether the following double-replacement reaction will produce a precipitate: ca(c2h3o2)2 + na2co3 --> caco3 + 2 nac2h3o2
no; all products are soluble
yes; the caco3 will precipitate
yes; the nac2h3o2 will precipitate
yes; both the caco3 and nac2h3o2 will precipitate

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

The p sub shell can hold up to 8 electrons in an atom. true or false?

Which atom or ion is the largest? 0 a. 0 0 0 0 e. li