Answer:
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment.
A. The bonds between the individual monomers of a polymer are broken by the addition of water molecules.
The molecule CO2 have 2 lone pairs located in the oxygen atoms. It has two double bonds also connecting carbon atom to the two oxygen atoms. It does obey the octet rule so the atoms need 8 electrons in each of them that is why electrons are shared.
AN element is composed from atoms with the same number of protons,
A compound contain two or more different elements
Here are 4 physical Properties of lanthanum
its
soft
malleable
ductile
and silver white colored metal.
