Answer:
The number of periods shows you the number of _______
<u>Electron Shell</u>
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Explanation:
<u><em>Modern periodic table is divided into Groups and Periods.</em></u>
A period is the horizontal row of the periodic table. There are <u>seven periods </u>in the periodic table.
It describes the following :
- The period in which a particular element found will show its <u>electron shell</u>
- The first period has Hydrogen and Helium = 1 - shell
- The second Period has Lithium to neon = 2- shells
A group is the vertical column of the periodic table . There are <u>18 groups</u> in total.
It describes the following :
The group number of the element is same as the<u> number of electrons in the outermost shell.</u>
The element having group 1 has = 1 electron in outer shell (example Na, K)
The element having group 2 has = 2 electron in outer shell (example Ca, Mg)
The element having group 0 has = full outer shell (example Ne Xe). these are also known as noble gases
Answer:
counter clockwise
Explanation:
Dont all planets in our solar system rotate counterclockwise?
Answer: when two atoms do not share electrons equally in a covalent bond.
Explanation:
Answer:
A tropical storm at sea has been upgraded to a hurricane.
Explanation:
Hurricane warnings are issued with respect to the conditions that may cause the commencement of a hurricane in a particular area. The warning is issued before the winds hit the tropical storm force. This helps in preparing for all the necessary precautionary steps before the storm force effects. The humans are strictly orders to evacuate the area immediately. The local officials warn the public through many means and the announcement through the radio is one of them.
