#Chemické prvky potrápili azda každého z nás. Všetci sme sa s periodickou tabuľkou stretli, no s prvkami, ktoré sú v nej uvedené, prichádzame do kontaktu v každodennom živote aj po ukončení školy. Ešte si však vieš vybaviť jednotlivé značky chemických prvkov? Svoje vedomosti si môžeš otestovať v dnešnom kvíze.
Chemické prvky tak, ako ich (ne)poznáme. Otestujte si svoje vedomosti o nich v dnešnom kvíze
Mal som %%score%% z %%total%% správne
9 / 10, nevedel som, co nie je radioaktivne
Sr je radioaktivne:
Natural strontium is a mixture of four stable isotopes: 84Sr, 86Sr, 87Sr, and 88Sr.[7] Their abundance increases with increasing mass number and the heaviest, 88Sr, makes up about 82.6% of all natural strontium, though the abundance varies due to the production of radiogenic 87Sr as the daughter of long-lived beta-decaying 87Rb.[19] Of the unstable isotopes, the primary decay mode of the isotopes lighter than 85Sr is electron capture or positron emission to isotopes of rubidium, and that of the isotopes heavier than 88Sr is electron emission to isotopes of yttrium. Of special note are 89Sr and 90Sr. The former has a half-life of 50.6 days and is used to treat bone cancer due to strontium’s chemical similarity and hence ability to replace calcium.[20][21] While 90Sr (half-life 28.90 years) has been used similarly, it is also an isotope of concern in fallout from nuclear weapons and nuclear accidents due to its production as a fission product. Its presence in bones can cause bone cancer, cancer of nearby tissues, and leukemia.[22] The 1986 Chernobyl nuclear accident contaminated about 30,000 km2 with greater than 10 kBq/m2 with 90Sr, which accounts for 5% of the core inventory of 90Sr.[23]
9/10 ten radioaktivny prvok ma zradil.
aj mna
Mňa zasa objaviteľka polónia.
Bol zle, už to zmenili. Ten správny čo tam mali mal tiež svoje izotópy. Teraz je tam ako správny vodík a to by si vedel 🙂
8/10
Platina je drahšia ako Zlato? Platina je okolo 700 dolarov za uncu, zlato 1200… Obrali ma o 10/10
Robíš si srandu?
Tak ma pouč 🙂 Platina 1g : 25,53 USD ; Zlato 1g : 38.56 USD
ok. maš recht.
10/10 nieco tazsie nemate?
7/10