In which state does the precipitate exist in a precipitation reaction?

solid.

Explanation:

Precipitate is the solid substance produced during a chemical reaction carried out in a solution.

The precipitate is formed when the reactants in a chemical reaction, which are in solution, form a compound that is insoluble, and so it cannot stand dissolved but precipiates, normally going to the bottom of the vessel, in solid form.

The phases in a chemical equation are indicated using letters inside parenthesis placed to the right of the chemical formula of each compound or element.

These are the common uses: s for solid, aq for aqueous solution, l for liquid, and g for gaseous.

This is an example:

2 NaOH (aq) + CuCl₂ (aq) → 2 NaCl (aq) + Cu (OH)₂ (s)

The phases are:

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.