Lava that cools so quickly that ions do not have time to arrange themselves into crystals will form igneous rocks with a texture.
a. porphyritic
b. glassy
c coarse-grained
d. fine-grained

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

The position of a crate sliding down a ramp is given by x=(0.05t^3) m, y=(1.7t^2) m, z=(6−0.85t^5/2) m, where t is in seconds. (a) determine the magnitude of the crate's velocity when t = 2 s. (b) determine the magnitude of the crate's acceleration when t = 2 s.

How do you know how many valence electrons an atom has?