D) + ΔH and +ΔE
Given this is one of the answer choices
Answer:
The answer to your question is Al, Mg, Si, S, P
Explanation:
First ionization energy is the energy necessary to remove an electron from an atom in a gaseous form.
Element First ionization energy (kJ/mol)
Magnesium 737.7
Aluminum 577.5
Silicium 786.5
Phosphorus 1011.8
Sulfur 999.6
Order: Al, Mg, Si, S, P
Calcium belongs to the alkaline earth metal group. Within a group, the melting point decreases from top to bottom. This is because the as the atomic radii increases the outer valence electrons are shielded by the inner electrons and experience a lower nuclear attraction. As a result the bonds can be broken easily which lowers their melting point.
The three elements below Calcium ib Group II A which have a lower melting point are: Strontium (Sr), Barium (Ba) and Radium (Ra)
Answer:
-76
296
228
603
485
Explanation:
Subtract 273 to 200 to get -76
add 273 to 23 to get 296
add 273 to -45 to get 228
subtract 273 to 876 to get 603
add 273 to 212 to get 485
1st row: lots - little
2nd: fast-slow
3rd: Up and down - Back and forth
