The basic building block of silicate minerals is the silica ...

[iveyjurea]

The basic building block of silicate minerals is the silica ___________________ _. Fill in the blank(s) with the appropriate word(s).

Question 2

Tightly bonded, complex groups of different atoms that act as single units (e.g., carbonate) are known
  as ___________________ _. Fill in the blank(s) with the appropriate word(s).

[Anonymous]

Answer to Question 1

tetrahedron

Answer to Question 2

radicals

[iveyjurea]

YES! Correct, THANKS for helping me on my review

[patma1981]

Thanks for the timely response, appreciate it