## The Number

31. The X +2 ion has 22 electrons, to determine its atomic number: a) 22 b) 24 c) 20 d) 18 e) 26 32. Which of the following is isoelectronic species? a) 12mg b) 13Al +3 c) 8AL-2 d) 11 to +1 e) 10Ne 33. For the atoms of different elements that have the same number of neutrons are called: a) isotopes. b) isotones.

c) isobars. d) isoelectronic. e) ions. 34. The sum of the mass numbers of two isotopes is 88 and half the sum of its neutrons is 24. Find the number of electrons one with charge +2. a) 22 b) 20 c) 18 d) 26 e) 24 35.

In two isobars atoms, their average nuclear charges is 19 and the average number of neutrons is 21. Find the mass number. a) 40 b) 50 c) 35 d) 30 e) 45 36. Calculate the number of fundamental subatomic particles for the 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. Find the highest number of mass. a) 64 b) 32 c) 56 d) 28 e) 14 38. A divalent cation has a nuclear charge of +3,84.10-18C. How many electrons shows that cation? (E = -1,6.10-19 C) a) 20 b) 21 c) 22 d) 23 e) 24 39. Ion shown: What are isoelectronic? 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 the squares of the mass number and atomic number of a certain atom is 2580. If the number of neutrons is 30. Indicate the number of nucleons. a) 54 b) 28 c) 58 d) 46 e) 7 42. An atom of copper, with atomic number 29 and mass number 64, lost two electrons, then I. Its nuclear charge increases by 2. II. Ion atomic number is 27. III. The mass number does not varies. IV. The size of the electron cloud decreases. Are correct a) I and II b) II and III c) I and III d) III and IV e) All 43. A trivalent cation has a total of 77 fundamental subatomic particles: if the number of protons is in 5:6 ratio with the number of neutrons. Calculate the number of electrons in this ion. a) 20 b) 22 c) 25 d) 28 e) 32 44. A number of isotopes of some element has a sum of mass numbers equal to 173 and have a total of 95 neutrons. If the atomic number is less than 26. Calculate the number of isotopes. a) 3 b) 4 c) 5 d) 6 e) 8 45. An ion has a nuclear charge of +4.48 x 10-18C. If the area there 25 extranuclear electrons. Then the ion is an ………… a) divalent anion b) divalent c) trivalent anion d) and trivalent cation) monovalent anion

## Ani Problem

The problems exist on their own, while the breaks "live" in our mind as interpretations of what happened and this is what gives us the power to decide how to deal from a position player, proactive, seeking solutions, rather than stay in Complaints which do not lead us anywhere. If we refer to the unwanted situation as a "problem", it seems that there is only one course of action to resolve it. If we refer to unwanted status as a "break", we can find several courses of action, new re-formulations different to the initial finding through them, new courses-action settlement. The key to position yourself against the problems, take note: If you change the interpretation of what happened, you may be facing an opportunity. Every problem (which we call from now on, break) hides one or more occasions. Many of the problems faced are resolved as such or converted into learning opportunities If you meddle with the interpretation you have of them.

This new interpretation allows us to act in anticipation of possible problems that might occur. If we position ourselves as actors, we "advance" to solve problems by declaring them as breaks, taking immediate action for resolution. Why wait could "explode" especially if we can and do something positive? Here I propose some questions for you to work yourself into a problem that are going through, to turn it into a break and be hero of the same, seeking solutions at least those that are within your reach. You can use these questions to any problems you are experiencing: Write a problem you are experiencing at this time. How could you re-formulate it differently to make it a good break? What if you take the problem accepting your participation in it? What could change? "Worry does not empty tomorrow of problems, empty today of its strength. Watch carefully major problems, great opportunities disguised as "Patricia Hashuel Love, Ani 2006-2010 Ana Cecilia Vera Vera. All Rights Reserved. Do you want to publish my articles in your newsletter, blog or website? You can if you include the full text below it …