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quiz 3 - 1 What defines the element to which a particular...

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1.   What defines the element to which a particular atom belongs?    Student Response Value Correct Answer Feedback 1.  The number of  protons in the  nucleus. 100%    Correct!  2. The number of  protons plus the  number of neutrons in  the nucleus 0%      3. The number of  protons plus the  number of electrons  plus the number of  electrons. 0%      4. The number of  neutrons in the  nucleus. 0%      5. The number of  electrons orbiting  around the nucleus. 0%      General Feedback: Elements are defined by the number of protons in the nucleus. Score: 1/1    2.   An isotope has a half-life of 13 years. If there is a 3 gram lump of this isotope, how much of the isotope will  remain after a period of 52 years?   
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  General Feedback: There were 3 grams initially with a hald life of 13 years. After 13 years, 1/2 of the 3 grams decay away, so there  are 1.3 grams left. After another 13 years (26 total) 1/2 of the 1.5 grams or 0.75 grams will remain. After another 
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