Which one of the following is a characteristic of a metal?
a .becomes negative when combined with other elements.
b. changes the color of litmus paper to red.
c. conducts heat readily.
d. reacts with bases to produce salts.

1/0.14nm = 10^10/1.4 a lot

no simpler subs form complex ones. synthesise = make

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.