Ayellow precipitate is formed when combining two colorless solutions. what type of reaction have you likely observed?

Answer is: the type of reaction is double displacement reaction.

For example, chemical reaction: 

Pb(NO₃)₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq).

aq(aqueous) means dissolved in water.
s(solid) means that salt (in this reaction PbI₂) not dissolved in water and 

form a yellow precipitate.

Cations (Pb²⁺ and K⁺) and anions (NO₃⁻ and I⁻) of the two reactants switch places and form two new compounds.

Double displacement reactions (more reactive metals displace metals with lower reactivity).

So nodal plane is the plane of zero electron density . The number of nodal planes for an orbital is equal to its Azimuthal quantum number 1 value . No of nodal planes for s - orbital (l=2) is 1. No of nodal planes for s - orbital (l=0) is 2.make me as brain liest