Diagram shows the decay curve of a radioactive substance.

Rajah menunjukkan lengkungan reputan bagi satu bahan radioaktif.

If the initial activity of the radioactive substance is 160 counts per second, what is the activity after 90 days?

Jika keaktifan awal bagi bahan radioaktif itu ialah 160 bilangan per saat, berapakah keaktifannya selepas 90 hari?

What is the use of radioisotopes in the field of archaeology?

Apakah kegunaan radioisotop dalam bidang arkeologi?

A radioactive radiation is used to control the thickness of metal sheet in a metal manufacturing industry. Which of the following radioactive radiation is used?

Satu sinaran radioaktif digunakan untuk mengawal ketebalan kepingan logam dalam industri pembuatan logam. Antara sinaran radioaktif yang berikut, manakah digunakan?

Which of the following is not the use of radioactive radiations?

Antara yang berikut, manakah bukan kegunaan sinaran radioaktif?

Radium-226 (Ra) has an atomic number of 88 and atomic mass 226. It is part of the Uranium decay series. Ra-226 decays into ____ by emitting an alpha partical