a) 8
40*20%
=40*20/100
=800/100
=8
The atomic weight of the unknown element, which is approximately 20% less than calcium (40 amu), is estimated to be 32 amu.
The atomic weight of an unknown element is said to be approximately 20% less than that of calcium, which has an atomic weight of 40 atomic mass units (amu). To calculate the approximate atomic weight of the unknown element, take 20% of 40 (which is 8) and subtract it from 40. The result is 32 amu (40 - 8 = 32), so the correct answer is (c) 32.
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lithium
Fluorine
The answer is
OSHA standards appear in the Code of Federal Regulations (CFR) and was then broken down into two parts.
The explanation:
OSHA standards are rules that describe the methods that employers must use to protect their employees from hazards. There are OSHA standards for Construction work, Maritime operations, and General Industry, which is the set that applies to most worksites. These standards limit the amount of hazardous chemicals workers can be exposed to, require the use of certain safe practices and equipment, and require employers to monitor hazards and keep records of workplace injuries and illnesses
It contains standards to ensure a comfortable and high quality research tools like the databases. These standards are to be strictly monitored to ensure the safety of workers.
A planet's orbit around a star is an example of an orbit, which is the route taken by an object as it travels around another object under the effect of gravity. On the other hand, an electron orbital relates to the three-dimensional area surrounding an atom's nucleus where there is the greatest chance of encountering an electron.
The route a planet takes as it circles around a star or another astronomical object in space is known as its orbit. It is influenced by the planet's motion and the gravitational attraction of the object it circles. A planet's orbit might be elliptical, which means it is not a complete circle but rather has an elongated shape instead.
Astronomers use the study of planet orbits and their properties to better understand how celestial bodies move through space. An electron orbital is a probability distribution that shows where an electron is most likely to be found within an atom, whereas an orbit is a definite track that a celestial object travels as a result of gravity.
Therefore, a planet's orbit around a star is an example of an orbit, which is the route taken by an object as it travels around another object under the effect of gravity. On the other hand, an electron orbital relates to the three-dimensional area surrounding an atom's nucleus where there is the greatest chance of encountering an electron.
Learn more about Planet's orbit, here:
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(3) Na2S