
10. klase. Atoma uzbūve un radioaktivitāte
Flashcard
•
Science
•
10th Grade
•
Hard
Ilga Blumberga
FREE Resource
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11 questions
Show all answers
1.
FLASHCARD QUESTION
Front
Cik protonu ir bromam (Br)?
Back
35
Answer explanation
Bromam (Br) ir 35 protonu, kas ir tā atomnumurs. Tas nozīmē, ka katram bromam ir 35 protonu, kas ir pareizā atbilde.
2.
FLASHCARD QUESTION
Front
Cik neitronu ir bromam (Br)?
Back
45
Answer explanation
Bromam (Br) ir atomu skaits 35. Neitronu skaits tiek aprēķināts kā atoma masa (aptuveni 80) mīnus atomu skaits. Tādējādi 80 - 35 = 45, kas ir pareizā atbilde.
3.
FLASHCARD QUESTION
Front
Cik elektronu ir bromam (Br)?
Back
35
Answer explanation
Bromam (Br) ir atomu skaits 35, kas nozīmē, ka tam ir 35 elektroni. Elektronu skaits ir vienāds ar atomu skaitu neitrālos atomos.
4.
FLASHCARD QUESTION
Front
Cik liela ir broma (Br) atommasa?
Back
80
Answer explanation
Bromam (Br) ir atommasa 79.904, kas tiek noapaļota uz 80. Tādēļ pareizā atbilde ir 80.
5.
FLASHCARD QUESTION
Front
Kas šajos gadījumos ir 76, 78 un 80?
Back
Se izotopu atommasa
Answer explanation
Skaitļi 76, 78 un 80 apzīmē Selēna izotopu atommasu, kas ir atkarīga no protonu un neitronu skaita. Tādējādi pareizā atbilde ir atommasa.
6.
FLASHCARD QUESTION
Front
Kuram Se izotopam kodolā ir 44 neitroni?
Back
Se-78
Answer explanation
Selēnam (Se) izotopu masas skaitļi ir to protonu un neitronu kopskaits. Se-78 satur 34 protonus (Se atomnumurs) un 44 neitronus (78-34=44), tādēļ pareizā atbilde ir Se-78.
7.
FLASHCARD QUESTION
Front
Kurš radioaktīvā starojuma veids redzams attēlā?
Back
Beta
Answer explanation
Attēlā redzamais radioaktīvā starojuma veids ir beta starojums, jo tas sastāv no elektroniem, kas tiek izdalīti no atomiem. Alfa starojums satur helium atomus, bet gamma starojums ir elektromagnētiskais starojums.
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