The simplest atom is that of the element hydrogen and it consists merely of a single proton in a nucleus and a single electron in orbit around it. The helium atom is the next simplest atom and consists of a nucleus containing two protons and two neutrons, with two electrons orbiting around it. For an electron to be able to move1 around a nucleus, it must have a force exerted on it and pulling it towards the nucleus. This force is the electrical attractive force exerted by the positive nucleus on the negative electron.
Note:
5 For an electron to be able to move — äëÿ òîãî ÷òîáû ýëåêòðîí ìîã äâèãàòüñÿ
2. Define the parts of speech:
1. readjustment, 2. periodic, 3. rapidity, 4. resentment, 5. chemical, 6. chemically, 7. realize, 8. receiver, 9. careful, 10. statement, 11. localize, 12. generalize, 13. relatively, 14. relation, 15. identical, 16. creation, 17. atomic, 18. resentful, 19. identification, 20. carbonize, 21. specially, 22. speciality, 23. vaporize, 24. imperfection, 25. doubtful, 26. displacement
3. Translate the participles:
following, performing, taking place, having, forming, employing, creating, saying, including, providing, obtaining
4. Translate:
amplify — óñèëèâàòü; amplifier — …
conduct — ïðîâîäèòü (òîê); conductor —…
detect — äåòåêòèðîâàòü, âûïðÿìëÿòü; detector — …
control — óïðàâëÿòü; controller — ...
divide — äåëèòü; divider — ...
learn — ó÷èòü; learner — ...
operate — ïðèâîäèòü â äåéñòâèå; operator — ...
heat — íàãðåâàòü; heater — ...
insulate—èçîëèðîâàòü; insulator— ...
emit — èñïóñêàòü; emitter — ...
direct — íàïðàâëÿòü; director — ...
use — èñïîëüçîâàòü; user — ...
rectify — âûïðÿìëÿòü (òîê); rectifier— ...
5. Translate:
1. This layer is thicker than that one. 2. This impurity is better than that one. 3. Our laboratory is larger than this one. 4. This metal is harder than that one.