C) no till farming I believe is the correct answer
Sorry I got it wrong on my test
They use to determine weather
<span>The
answer is D. So as to take the shortest time to react to stimuli, most sensory neurons
are looped through the spinal cord to motor neurons. Following a reflex action,
the signal is later passed to the brain, from the spinal cord, for the signal
to be analyzed. A reflex arc is divided into
somatic and autonomic reflex arcs. The former is connected to outer muscles
while the later to inner organs. </span>
Answer:
alpha decay because alpha particles have two protons and two neutrons
Explanation:
An alpha particle has a nucleus which is made up of 2 protons and 2 neutrons. It is actually a Helium cation.
A nuclear reaction involves the nucleus and the elementary particles contained within them.
If an isotope undergoes radioactive decay and the new isotope that forms has an atomic number that is 2 less than the original isotope,it shows an alpha decay has occurred.
The atomic number is the number of protons and it is the same as the number electrons for a neutral atom.
In this isotope, the reaction must have involved loss of two protons from the nucleus. The atomic number comes two less than that original one.
The mass number i.e number of proton + neutron is 4. Therefore, the mass number of the isotope would also decrease by 4.
This is to obey the law of conservation by mass.
