Which of the following is a radioactive element?

এই অধ্যায়ের আরও প্রশ্ন

• C-01-Q106Uranium and radium emit harmful rays which may cause—
• C-01-Q107Which of the following substances are dangerous for the environment?
• C-01-Q108Substances that are dangerous for the environment should be—
• C-01-Q109Hydrochloric acid, sulphuric acid and concentrated sodium hydroxide are examples of—
• C-01-Q110Inhalation of corrosive substances may cause—
• C-01-Q111In the process of chemical research—
• C-01-Q112Which of the following are scientists who are part of the first school to explore the mystery of chemistry?
• C-01-Q113Chemistry is related to other branches of science because—
• C-01-Q114The harmful effects of chemicals on the environment include—
• C-01-Q115Safety items used in a chemistry laboratory include—