The number of particles within an atom in its nucleus The number of protons in an atom in its nucleus The number of neutrons in an atom in its nucleus The number of electrons in an atom in its nucleus 9 . Atoms of an element always have the same number of protons but can have...
The cell contents i.e. the sub-cellular structures like cytoplasm, nucleus, (small vacuoles), mitochondria etc. are all held together and enclosed, by the soft cell membrane which controls the passage of substances in and out of the cell. Because not everything can pass through the membrane,...
from moving from left to right, the number of protons increases as well as the electrons because the positive charge increases in the nucleus causing the strengthening of its attraction toward electrons. On the contrary, the atomic radius increases in a group moving down with the increase of pro...
hadbeenrepelledbylargepositivechargeswithinthefoil-nucleiofatomsofgold. Arrangementofelectronsaroundthenucleus FromGCSEyoushouldbefamiliarwiththeBohrmodelofelectronsarrangedaroundanucleus. Theelectronsareincertainenergylevelsandeachenergylevelcanholdonlyuptoamaximum ...
DNA is contained in a double membrane (nuclear envelope) which protects it from damage. Nuclear pores allow substances in and out of the nucleus. DNA molecules are too big to leave the nucleus so they are transcribes into RNA.
[FONT="Times New Roman"][SIZE="3"] It is well known that, "Neil bohr failed in his model in which he described an electron as a charged particle moving in well defined circular orbits about the nucleus." However he failed because of the two major reasons.. a) It didn't consider th...
1.StructureofaNeuron 1.Cellbody:containsnucleus,cell organelles;siteofmetabolicactivities 2.Nucleus 3.Dendrite:receivesimpulsesfrom otherneuronsandcarriesthem towardthecellbody 4.Axon:carriesimpulsesaway fromthecellbody 5.Schwanncellnucleus 6.Schwanncell:surroundsthe ...