Which chemical formula represents the composition of a mineral that usually exhibits fracture, not cleavage? 1.

Mg Si4010(OH)2

2.

NaCl

3.

CaCO3

4.

(Fe, Mg)2SiO4

If you have a difficult time knowing where your hand is without looking at it you may be having a problem with your what ?

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.

In the sentence "a mining company will consider the distribution of coal when deciding how to mine the coal," what does the word distribution mean?