9. An atom has an electric nucleus of 14+. The number of protons and electrons in this atom are: A. 14p and 14e. B. 14p and 15e. C. 13p and 14e. D. 14p and 13e
10. If only based on a proton number of kernel, can we verify the value after here?
A. Electrons number of particles, neutrons number of particles.
B. Number of electrons, nuclear charge.
C. Numerical neutrons, nuclear charge.
D. Electron number, neutron number of particles, nuclear charge.
11. How much larger is the diameter of the atom than the diameter of the nucleus?
A. 100000 times. B. 100 times. C. 1000 times. D. 10000 times.
12. Which of the following statements is false?
A. The atom is electrically neutral.
B. Atoms have hollow structure.
C. Whole file volume in kernel.
D. Multiply the size of citric acid.
13. Which of the following statements is false?
A. In an atom, the number of protons is equal to the number of electrons.
B. Different elements have the same size and mass.
C. small element is an integer hydrogen.
D. Electrons move around the artificial shells of atoms.
14. In 1897, who did the experiment to create cathode rays, thereby discovering the existence of particle electrons?
A. E. Rutherford. B. J. Thomson. C. J. Chadwick. D. A. Sommerfeld.
15. In 1918, who discovered the proton by firing a nitrogen particle with a  particle?
A. E. Rutherford. B. J. Thomson. C. N. Bohr. D. J. Chadwick.
16. In 1932, who discovered the nucleus when bombarding the nucleus of an atom with a  particle?
A. E. Rutherford. B. J. Thomson. C. N. Bohr. D. J. Chadwick.
17. To represent the atomic size, users use the unit nanometer (nm) and angstrom (Å) with:
A. 1nm = 1000Å. B. 1nm = 10-1Å. C. 1nm = 10Å. D. 1nm = 10-3Å.
18. If we zoom the kernel up to a result of the path with 6 cm, the sugar glass will be
A. 200 m. B. 300 m. C. 600 m. D. 1200 m.
19.The total charge of electrons in an atom is –1,2816.10-18 C. Know qe = –1,602.10-19C. Number of particles electron has in this element is:
A. 8. B. 9. C. 10. D. 11.
20. The total charge of electrons in an atom is –3,204.10-18 C. Know qe = –1.602.10-19C. Number of protons has in this element is:
A. 22. B. 21. C. 19. D. 20.
21. The atomic mass of sodium is 23u. Knowing 1u = 1.6605.10-27 kg. Calculate the mass in kilograms of the atom sodium is:
A. 1.3838.10-28 kg. B. 7,200.10-29 kg. C. 3.1926.10-27 kg. D. 3.8192.10-26 kg.
22. Copper has an atomic mass of 63.54u. In a co-atom there are 29 electrons. Electron volume print 1 kg dong co value is:
A. 2.5 grams. B. 0.25 grams. C. 0.86 grams. D. 8.6 grams.
23. An M atom has a total of 60 p, n, and e particles, of which 20 are uncharged. Electron number in M element is:
A. 21. B. 20. C. 19. D. 22.
24. An atom X has a total of 92 p, n, and e particles, where the total number of charge carriers is more than the number of zero particles. charge is 24. Proton number of particles in atom X is:
A. 29. B. 34. C. 30. D. 31.