To atoms of different elements that they present/display the same neutron number calls to them: a) isotopes. b) isotones. c) isobars. d) isoelectrnicos. e) ions. 34. The sum of the mass numbers of two isotopes is 88 and semisum of its neutrons is 24. To find the number of electrons of one of them with load +2.

a) 22 b) 20 c) 18 d) 26 e) 24 35. In two atoms isobars, the average of its 19 nuclear charges is and the average of the number of its neutrons is 21. To find the mass number. a) 40 b) 50 c) 35 d) 30 e) 45 36. It calculates the number of particles fundamental subatomics stop ion: a) 200 b) 280 c) 283 d) 278 e) 189 37.

The sum of the mass numbers of two isotopes is 60 and the difference of its neutrons is 4. To find the greater mass number. a) 64 b) 32 c) 56 d) 28 e) 14 38. A divalente cation presents/displays a nuclear charge of +3.84,10 18C. How many electrons it presents/displays said cation? (e = -1,6.10-19C) a) 20 b) 21 c) 22 d) 23 e) 24 39. Of ions shown: which are isoelectrnicos? I. 15 P+3 II. 16S-2 III. 20 Ca2+ IV. 18Ar a) II and II b) II and III c) I and III d) II, III and IV e) All 40. The difference of squared of the mass number and the atomic number of a certain atom is 2580. If the neutron number is 30. It indicates the mass number. a) 54 b) 28 c) 58 d) 46 e) 7 42. A copper atom, whose 29 atomic number is and its mass number 64, loses 2 electrons, then: I. Its nuclear charge increases in 2. II. Its atomic number of the ion is 27. III. The mass number does not vary. IV. The size of the electronic cloud it falls. They are correct a) I and II b) II and III c) I and III d) III and IV e) All 43. A trivalent cation presents/displays a total of 77 particles fundamental subatomics: if the number of protons this in relation 5:6 with the neutron number. It calculates number of electrons of this ion. a) 20 b) 22 c) 25 d) 28 e) 32 44. An amount of isotopes of certain element owns a sum of equal mass numbers to 173 and present/display a total of 95 neutrons. If the atomic number is smaller of 26. It calculates the number of isotopes. a) 3 b) 4 c) 5 d) 6 e) 8 45. An ion owns a nuclear charge of +4,48x10-18C. If in the extranuclear zone it exists 25 electrons.

a) 22 b) 20 c) 18 d) 26 e) 24 35. In two atoms isobars, the average of its 19 nuclear charges is and the average of the number of its neutrons is 21. To find the mass number. a) 40 b) 50 c) 35 d) 30 e) 45 36. It calculates the number of particles fundamental subatomics stop ion: a) 200 b) 280 c) 283 d) 278 e) 189 37.

The sum of the mass numbers of two isotopes is 60 and the difference of its neutrons is 4. To find the greater mass number. a) 64 b) 32 c) 56 d) 28 e) 14 38. A divalente cation presents/displays a nuclear charge of +3.84,10 18C. How many electrons it presents/displays said cation? (e = -1,6.10-19C) a) 20 b) 21 c) 22 d) 23 e) 24 39. Of ions shown: which are isoelectrnicos? I. 15 P+3 II. 16S-2 III. 20 Ca2+ IV. 18Ar a) II and II b) II and III c) I and III d) II, III and IV e) All 40. The difference of squared of the mass number and the atomic number of a certain atom is 2580. If the neutron number is 30. It indicates the mass number. a) 54 b) 28 c) 58 d) 46 e) 7 42. A copper atom, whose 29 atomic number is and its mass number 64, loses 2 electrons, then: I. Its nuclear charge increases in 2. II. Its atomic number of the ion is 27. III. The mass number does not vary. IV. The size of the electronic cloud it falls. They are correct a) I and II b) II and III c) I and III d) III and IV e) All 43. A trivalent cation presents/displays a total of 77 particles fundamental subatomics: if the number of protons this in relation 5:6 with the neutron number. It calculates number of electrons of this ion. a) 20 b) 22 c) 25 d) 28 e) 32 44. An amount of isotopes of certain element owns a sum of equal mass numbers to 173 and present/display a total of 95 neutrons. If the atomic number is smaller of 26. It calculates the number of isotopes. a) 3 b) 4 c) 5 d) 6 e) 8 45. An ion owns a nuclear charge of +4,48x10-18C. If in the extranuclear zone it exists 25 electrons.

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