Answer:
Chlorine Ion
Explanation:
The chlorine ion is adding 1 valence electron in order to complete its outer most shell. It has a charge of 1- meaning it is adding an electron.
Answer:
The answer is B. Limiting factors can lower birth rates, increase death rates.
Answer:
Explanation:
The net force on electron is electrostatic force between electron and proton in the nucleus .
Fc =
This provides the centripetal force for the circular path of electron around the nucleus .
Centripetal force required =
So
Answer: last option: Ar
Justification:
The metallic character of the elements in the periodic table increase from right to left and from top to bottom.
That means that the elements of groups (rows) 1 and 2 and periods (columns) 6 and 7 are the most metallics, and the elements of groups 17 and 18 and periods 1 and 2 are the least metallics.
Na, Mg, Al, P and Ar are in the same period (row) so you can differentiate their metallic character by the rule that the more to the right on the row the less metallic the element is.
Na (left end the row) is the most metallic and Ar (right end of the row) is the least metallic.
P and Ar are less metallic.
Then, the list arranged in order of decreasing metallic character is:
Na > Mg > Al > P > Ar.
Therefore, the answser is Ar.