Answer:
DNA from dead Streptococcus cells entered live cells and altered the live cell's characteristics
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Answer:
The correct option is;
C. Two in the first energy level, six in the second energy level
Explanation:
The electrons in an atom are arrange in orbital shells which are situated at different levels within the structure of the, depending on the energy of the electron. Electrons with the least amount of energy are found in the shell closest to the nucleus of the atom which is the first energy level
The maximum number of electrons that can be found in a given an energy level is obtained with the following formula;
The number of electron = 2 × n²
Where;
n = The number of the different energy level
Therefore;
The maximum number of electrons in the first energy where n = 1 is given as follows;
The number of electron = 2 × 1² = 2 electrons
The maximum number of electrons in the second energy level where n = 2 is given as follows;
The number of electron = 2 × 2² = 8 electrons
Given that there are only 8 electrons in the atom, we therefore have, 2 electrons in the first energy level and the remaining 8 - 2 = 6 electrons in the second energy level.
<span>Boron : It is used in many cleaning products- detergents and bleaches.
Silicon : Silicon parts are used in computers, transistors, solar cells, LCD screens and other semiconductor devices.
Germanium : Create alloys in florescent lamps,Solar Cells,LEDs and other light emitting devices
Arsenic : car batteries,added to animal food to prevent disease and to promote growth
Antimony : used in machine bearings,used in way in the production of diodes, Hall effect devices and infra-red detectors,
Tellurium : used in making ceramics, chalcogenide glasses, tinting glasses,
Polonium : Polonium is used to eliminate static electricity produced
during processes such as rolling paper, wire and sheet metal.
Astatine : used as a radioactive tracer and in cancer treatment. </span>