Answer:
C) Electrons orbit the nucleus of an atom.
Explanation:
When Thompson performed the cathode ray tube experiment, he noticed that the magnet would bend the light inside the tube. The light came from the excitement of the electrons within the metal. The magnet attracted these bouncing electrons to create light.
Answer:
A. Ernest Rutherford
B.Bohr
C. Eugen Goldstein
D.. Santiago Ramon y cajal
E.john Dalton
F.isobars - a line drawn on a weather map connecting points of equal pressure is called isobars.
example.. argon 40
potassium 40
.two differences between isobars and isotopes.
isobars are those elements which have different atomic number but the same mass number. while isotopes are those elements having the same atomic number and different mass number..
two uses of isotopes.
uranium 235 - for nuclear fission and as fuel in unclear reactors.
# an isotope cobalt - used In the treatment for cancer
# an isotope iodine - used in treatment of goiter.
Answer:
the molecular formula is C₁₄H₈O₂
Explanation:
Given that
The freezing point of camphor is lowered by 22.3°C
Amount of anthraquinone is 1.32g
depression constant is 40°C.kg.mol
Use the freezing-point depression equation
Molecular weight of solute, m =
m = 208g/mol
empirical formula of Anthraquinone is C7H4O
empirical formula weight = 104 g/mol
m = Molecular formula weight / empirical formula weight
m = 208 / 104
208.2 / 104.1 = 2
molecular formula = (C₇H₄O)₂
so, the molecular formula is C₁₄H₈O₂