WILL MARK AS BRAINLIEST PLZ HELP ASAP Q3 Crystals of lead nitrate and potassium iodide are placed at opposite ends of a container of water. Solid lead iodide forms after several minutes. The diagram shows the container at the start and after several minutes. crystals of crystals of potassium iodide lead nitrate lead iodid At the start After several minutes (a) Name the two processes that occur before the solid lead iodide forms.

chemical energy is stored in the chemical bonds of atoms and molecules. it can only be seen when it is released in a chemical reaction. when chemical energy is released, the substance from which the energy came is often changed into an entirely different substance.

this chemical reaction releases energy in the form of light and heat. chemical energy is the potential energy stored in the arrangement of atoms within molecules. breaking chemical bonds requires energy, while forming new chemical bonds releases energy.

the atp molecule can store energy in the form of a high energy phosphate bond joining the terminal phosphate group to the rest of the molecule. in this form,energy can be stored at one location, then moved from one part of the cell to another, where it can be released to drive other biochemical reactions.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

it means there are 3 atoms of oxygen