Treść zadania

Hartkors

Podaj skład jąder atomowych izotopów pierwiastków : 238U... 234U.. 224Ra

Zadanie jest zamknięte. Autor zadania wybrał już najlepsze rozwiązanie lub straciło ono ważność.

Najlepsze rozwiązanie

  • avatar

    0 0

    a)238U
    protonów=92
    elektronów=92
    neutronów=238-92=146

    b)234U
    protonów=92
    elektronów=92
    neutronów=234-92=142

    c)224Ra
    protonów=88
    elektronów=88
    neutronów=224-88=136
    To jest najłatwiejszy dział chemii.Oczekuję na najlepsze.

Rozwiązania

Podobne materiały

Przydatność 100% England for me

England for me is a country, where are a lot of old building and monuments. Inter alia monument is Stonehenge. This is a is a megalithic monument on the Salisbury Plain in England, about 85 miles southwest of London. These are huge stones , because many weighing between one and 45 tones. The most common theories suggest Stonehenge is an astronomical calendar, a religious site, or a combination...

Przydatność 70% About me.

I'm usually happy and relaxed. I don't like feeling worried or stressed. I like playing football, volleyball and basketball. Every day I chat with my friends. I like going to the sports arena. Family and friends are important in my life. I like meeting my friends. Once a week we play football or go shopping. I'm interested in sports. My favourite sports are ski jumping, Formula 1 and football....

Przydatność 100% Help my planet

I help my planet, that to be clean. Next my house there are a lot of boxes. These boxes are on glass, paper, cans and plastic. When I have a lot of bottles, old newspappers I put them in boxes. I’m very angry when I see factories near forests. I fight on an issue these factories. I do a lot to save energy. When I don’t need the light, I turn the light off. At my school it was the campaign...

Przydatność 100% Lets help old people

!!!Let’s help old people!!! We want to raise money for the old people’s home and buy a DVD player. Here are some ideas to quick raise money: -Help your parents in house cleaner. -Sell your old toy’s. -paint your neighbor fence. -Do the shopping.

Przydatność 100% Me as an interesting person.

It’s hard to be a judge of ourself and decide unmistakably if we are interesting or not cause for everone „interesting” means something else. So I can’t say nither “I’m really fascinating person” nor “Oh my God I’m so boring, I’m gonna kill myself!” I think I’m just as most of people at my age. Sometimes stubborn, especially if it goes on arguing with my parents and...

0 odpowiada - 0 ogląda - 1 rozwiązań

Dodaj zadanie

Zobacz więcej opcji