Answer:
B
Explanation:
For metals, the further away the valence electrons are from the nucleus, the higher the reactivity of the elements. Unlike halogens that are more reactive if the valence orbital shells are closer to the nucleus. This is due to ionization energies – which is the minimum energy required to discharge an electron from its orbit.
For metals this should be lower because they need to lose electrons to attain a stable electron configuration. For halogens it should be high because they don't need to lose electrons, but rather gain, in order to attain stable electron configuration.
Electrons in their orbital shells need to occur in pairs (with opposite quantum states) to be in stable configuration and as long as an atom has orbitals with single electrons, the atoms will be reactive as opposed to when its orbitals are ‘full’.
Answer:
Summer
Explanation:
North experiences opposite seasons from the South.
<span>Out of the following given choices;</span>
<span>A) </span>spur economic development in Africa
B) impede economic development in Africa
C) impede economic development in Europe
D) spur economic growth for those medical professionals
<span>The answer is B. Brain drain means a country is losing its professionals to the external market rather than working in the local market due to unfavorable local conditions. The country loses because it has few medical professionals to treat its people hence it carries a higher burden of diseased people. Additionally, to cater to this gap, it has to import these medical services which is more expensive than keeping local talent. </span>
Answer:
D might be the answer
Explanation:
I think its D because It makes the most sense but I wouldnt really know this stuff,I am only 9th grade sooo?
