1. The phenomenon of radioactivity was discovered by ________.

A. Marie Curie
B. Becquerel
C. Thomson
D. Bohr

2. What is the chemical symbol for gold?

A. Ag
B. Ge
C. Fe
D. Au

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1. The phenomenon of radioactivity was discovered by ________. A. Marie Curie B. Becquerel C. Thomson D. Bohr 2. What is the chemical symbol for gold? A. Ag B. Ge C. Fe D. Au Total Marks: 0
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1. The phenomenon of radioactivity was discovered by ________. A. Marie Curie B. Becquerel C. Thomson D. Bohr 2. What is the chemical symbol for gold? A. Ag B. Ge C. Fe D. Au Total Marks: 0
Read more