How many electron shells does tungsten have
2 answers:
Answer:
Explanation:
Tungsten is an element in the periodic table with an atomic number of 74, symbol W, and atomic mass of 183.84 u.
One atom of Tungsten has 74 electrons, the shell structure is 2.8.18.32.12.2, and there are 6 electron shells.
Tungsten is a rare metal and is the strongest known metal on Earth.
Tungsten can be used to make bullets and missiles.
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Answer:
The correct option is A.
Explanation:
The number of bacteria in an experiment can be represented by an exponential function
where, x represents the number of hours.
We need to find the value of x when f(x)=64.
Substitute f(x)=64 in the given function.
It can be rewritten as
On comparing both sides by get
The value of x is 3.
Since f(3)=64 it means the population of bacteria is 64 in 3rd hour.
Therefore the correct option is A.