Potassium is an alkali metal with the chemical symbol K. It has an atomic number of 19, meaning that it has 19 positively charged protons. It also contains 19 electrons, which have a negative charge, and 20 neutrons, which do not hold a charge
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Answer:
In the absence of ethylene hormone,growth and development of plant do't takes place.
Explanation:
Ethylene is an important plant hormone that in produced by plants for the purpose of growth, development and respond to stress for various purpose through out it's life cycle.
They are volatile and are also required in the field of agriculture for ripening of fruits, seed germination, root stem development,sex determination etc.
Over use of ethylene may provide harmful impact on the plant as it spoil the products.
Answer:
The wavelength of the given electromagnetic radiation is 3.25 m.
Explanation:
We know that,
Frequency (f) = c / λ;
where,
c - speed of light =
λ - wavelength of the radiation.
Given,
f = ,
From the above formula,
λ =
λ =
λ = 3.25m;
Therefore,
Wavelength of the given radiation = 3.25 m
Noble gasses because they have 8 electrons