Explanation:
The use of microorganism in our day to day life is making medicine.
Answer:
The correct option is "Element 2 has very similar chemical properties as Element 4"
Explanation:
Both element 2 and element 4 have the same number of valence electrons; meaning they will be found in the same group (group 1) of the periodic table. Elements in the same group of the periodic table exhibit similar chemical properties. For confirmation, element 2 is sodium (based on the atomic number of 11 provided) while element 4 is rubidium (based on the atomic number of 37 provided) - the two elements are found in group 1 of the periodic table.
NOTE: Number of protons is the same as atomic number
Answer:
Aluminium (Al): (3*2)+(5*2)=16
Sulphor (S): (3*1)=3
Oxygen (O): (4*3)+(3*1)=15
0.25 g of U-235 isotope will be left.
<h3><u>
Formula used :</u></h3>
N = N₀/2
where,
N = amount of U-235 left after n-half lives = ?
N₀ = Initial amount of the U-235 = 1.00 g
n = number of half lives passed = 2ⁿ
Using the formula, we can conclude:
N = 1/2² = 0.25
Thus, 0.25 g of U-235 isotope will left .
<h3><u>The concept of half lives</u></h3>
A half-life is the amount of time it takes for something to go from 100% to 50%. The phrase is most frequently used in reference to radioactive decay, which happens when energetic atomic particles that are unstable lose momentum. There are 29 elements that have been shown to be capable of going through this process.
Like pharmaceuticals, advertising campaigns, and a variety of other things, information likewise has a half-life.
To view more questions based on half lives, refer to:
brainly.com/question/27144626
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