Answer:
A number is right I think
it was earnest rutherford he did the gold foil experiment where he shot alpha particles at gold foil that was supposed to be about 1 atom thick. He expected all the atoms to pass straight through but some bounced back, so he proposed that there was something small dense and positive in atoms aka the nucleus
Answer:
d=m/v If v increases then the density decreases. Denominator get larger
Explanation:
Answer:
the element is fluorine
Explanation:
for the future, add up the little dots- which are electrons and the total of the dots is the atomic number, the little number on the periodic table.
Periodicity is best defined as A. <span>the fact that elements increase in atomic mass in a regular way the repeating nature of physical and chemical properties. This is evident in the periodic table where elements belonging to one column has the same properties.</span>
