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Let’s go over the homework, pg. 100, Check-in & HMK Qs 1-3

Let’s go over the homework, pg. 100, Check-in & HMK Qs 1-3. Check-in: Use your graph to determine how many neutrons you would need to make a stable element with 75 protons. Anywhere between 92 & 115 neutrons. Check-in: How many neutrons would make a radioactive element with 75 protons?.

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Let’s go over the homework, pg. 100, Check-in & HMK Qs 1-3

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  1. Let’s go over the homework, pg. 100, Check-in & HMK Qs 1-3

  2. Check-in: Use your graph to determine how many neutrons you would need to make a stable element with 75 protons Anywhere between 92 & 115 neutrons.

  3. Check-in: How many neutrons would make a radioactive element with 75 protons? 92 or 115 neutrons

  4. Check-in: Explain the relationship between the words atom and isotope. Atoms can have many isotopes (different # of neutrons)

  5. 1. Imagine an atom with a nucleus of 31 protons and 31 neutrons. Does this represent an element? Why or why not? Yes! Gallium. It falls within the band of stability.

  6. 2. Find five radioactive elements on the periodic table. Name them. Determine the neutron to proton ratio of each atom. Examples: Any element with more than 83 protons. Radon – 222 86 p+, 136 n

  7. 3. How many protons could a stable atom with 90 neutrons potentially have? Which elements would these be? 60-75 protons Elements: Nd Re

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