Scientific notation

a) used to communicate the level of precision
b) used to keep track of very small and very large numbers during mathematical calculations
c) used to accurately measure volumes
d) used to measure length with precision

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

Draw metallic bonding if two copper