3 years ago

Nitrogen-fixing bacteria in the soil _____.

1 answer:

Ivan3 years ago

3 0

Nitrogen fixing bacteria
- converts gaseous nitrogen (N2) to NH3
- this ammonia picks up another H+ from the soil to later form NH4

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Americium-241 is an alpha emitter used in household smoke detectors and K-40 is a positron emitter used to date rock samples. Th

VMariaS [17]

Answer:

Np-237, Ar-40.

Explanation:

Alpha particle is positively charged particle having a mass of 4 unit. Hence,when alpha is removed from any isotope it produces a element having mass 4 units less than original isotope that was before emission. Americium 241 isotopes used in the smoke detector which emit an alpha particle to produce neptunium-237.

Potassium-40 emits positron which is having negative charge to lower one proton and increase one neutron number in the particle and in such way it will produce $^{40}Ar_{18}$ not $^{40}Ca_{20}$