Sodium chloride, nacl, is formed when a sodium atom transfers its electron to a chlorine atom. the difference in charge between the two atoms creates a(n) attraction that bonds them together.
a) electrostatic
b) elementary
c) gravitational
d) nuclear

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?

What is the mass of phosphorous in a 51-kg person