List 4 factors that suggest a chemical reaction has taken place

An atom's lewis dot structure has two dots, which element could it be, and why?

Which energy changes are associated with a liquid boiling? Energy is released, and potential energy decreases. Energy is absorbed, and potential energy increases. Energy is released, and kinetic energy decreases.

What characteristic do all parts of the electromagnetic spectrum share?

whAt is an example of a chemical change is: Boiling water, Melting butter, Spreading cream cheese, Toasting bread?

Find the product. (n + 8) (n - 2) n2 - 6n - 16 n2 + 6n - 16 n2 - 6n + 16

Compare and contrast the compounds CH4 and PH3 in terms of covalent bonding, molecular geometry (shape), and intermolecular forces. Which substance would experience a stronger attraction between its molecules, and why?

How do consumers energy

Given that the molar mass of NaCl is 58.44 g/mol, what is the molarity of a solution that contains 87.75 g of NaCl in 500. mL of solution? moles of solute Use molarity - liters of solution

What are 3 ways to seperate metal particles and salt

Sarah heated some orange coloured crystals in a test tube. The crystals turned green and fizzed. After the fizzing stopped, the test tube was allowed to cool. A green powder was left in the tube.