Which chemical family is composed almost entirely of synthetic ...

[Awilson837]

Which chemical family is composed almost entirely of synthetic elements?
 
  A) the actinides
  B) the lanthanides
  C) the halogens
  D) all of the above
  E) none of the above

Question 2

What do you expect the pH of a soil sample to be if the geology in the area was composed of a large amount of calcium carbonate (CaCO3)?
 
  A) low pH
  B) high pH
  C) negative pH
  D) neutral pH
  E) Calcium carbonate has no effect on pH.

[Liddy]

Answer to Question 1

A

Answer to Question 2

B

[Awilson837]

Excellent

[Perkypinki]

Gracias!