Elements in the same group tend to have very similar properties (D). This is due to the number of valence electrons each group has.
Answer:
c is the answer then check it out
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.
Answer:
The cell membrane is protective layer surrounding a cell.
