Help with physical scince please, big exam to study for?

Question

1. WHAT IS HTE EFFECT ON THE MASS NUMBER AND CHARGE OR A NUCLEUS WHEN IT LOSES A ALPHA PARTICLE?

2. WHY DOES A GEIGER COUNTER OCCANSIONALLY CLICK EVEN IF NO ARTIFICIAL RADIOISOTOPES ARE NEARBY?

3. WRITE THE EQUATION FOR THE TRANSMUTATION THAT OCCURS WHEN AN ALPHA PARTICLE COMBINES WITH A NITROGEN-14 ATOM, EMITTING A PROTON?

4.WHY DO NUCLEAR REACTIONS PRODUCE MORE ENGERY PER MASS OF MATTER THAN CHEMICAL REACTIONS?

5. AFTER 36.9 YEARS, A SAMPLE OF HYDROGEN-3 CONTAINS ONE EIGHTH OF THE AMOUNT IT CONTAINED ORIGINALLY. WHAT IS THE HALF-LIFE OF THE ISOTOPE?

I HAVE TO KNOW THESE FOR MY TEST TOMORROW AND I CANT FIND THEM. I HAD 40 PROBLEMS BUT I CANT FIND THESE 5 IN THE BOOK. CAN SOME ONE PLESE HELP ME. IF I FLUNK THIS TEST IM IN DEEP TROUBLE. IT IS 20% OF MY GRADE IN THIS CLASS. PLEASE HELP ME WITH THE BEST ANSWER BUT SHORTEST AS POSSIBLE. THANKS SO MUCH TO WHO EVER HELPS ME!!!

Answer 1

1.) An alpha particle is 2 protons and 2 neutrons (sometimes written as He2+). Thus, the nucleus loses 4 mass and loses 2 positive charge.

2.) Because there are also naturally occuring radioisotopes (carbon-14, for example).

3.) N-14 is regular Nitrogen. He2+ + N -> Oxygen 17 + 1 proton.

The product is Oxygen and not Carbon because 1 proton was emitted from the product.

4.) Because mass is being converted to energy. Remember that in this case E = mc^2, 1 kg of mass releases 1 kg * (299,792,458 m/s)^2 = 8.99 * 10^16 J.

5.) 1/8 = (1/2)^3, so 3 half-lifes have occurred. 36.9 / 3 = 12.3 years.

Answer 2

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Answer 3

try getting the answers from a freind before school starts and study fast