I think it is True. If not I am sorry. Best of luck to you and ur test! :)
<h3><u>Answer;</u></h3>
As, & Sr --------[Kr]
Be ------------------- [He]
O, & Mg ----------[Ne]
S, & Ca -------------[Ar]
<h3><u>Explanation</u></h3>
- <u>The Be+ ion has 2 electrons, just like He. The ions Mg2+ and O2− each has 10 electrons like Ne. </u>
- <u>The S2− and Ca2+ each has 18 electrons like Ar. The ions As3− and Sr+ each have 36 electrons like Kr.</u>
- <u>Atoms of elements lose or gain electrons to attain a stable configuration which is equivalent to the configuration of noble gases.</u>
- When atoms lose or gain electrons they form ions, which are either positively charged or negatively charged. When atoms lose electrons they form positively charged ions while if they gain electrons the form negatively charged ions
<u>Full question:</u>
When energy is changed from one form to another, some of the energy is lost to the surroundings as waste thermal energy. The more steps needed to arrive at the desired energy or the more types of energy that are generated, the more energy is wasted.
Which object would likely have the least amount of wasted energy?
A) an electric drill
B) a solar cell
C) a car engine
D) a hydroelectric dam
Solar cell
<u>Explanation:</u>
In an electric drill, the conversion of electrical energy into mechanical energy takes place. Heat energy is obtained when the desired object gets broken with the drill.
In car engine, thermal energy is obtained from the chemical energy which in turn is converted into mechanical energy which is very essential for moving car.
In hydroelectric dam, energy is obtained from water that is stored in dam. The potential energy of water is transformed into mechanical energy which in turn is converted into kinetic energy which again is transformed into an electrical energy.
In the above methods the transformation of energy takes many steps wherein more amount of energy gets wasted.
In Solar cell, the energy that is obtained from the sun is directly converted into electrical energy. Hence, in solar cell, only less amount of energy will be wasted.
I honestly don’t know I just need points sorry
Answer : The diameter in picometer is, 
Explanation :
As we are given that the diameter of an atom is 
. Now we have to convert it into picometers.
Conversion used from meter to picometer is:
As,
So, 
Thus, the diameter in picometer is,
