Answer:
hope it's helpful to you .
your 9th question is wrong but I did it correctly
it's not BaS2 it's BaS
Well... <span> to make life easier by means of machinery or tools. Basically the goal of technology is to advance the human race in ways we never would have been able to from the beginning. That's my definition or goal.</span>
Answer:
The reactants Cu(SO)₄ and Na₂(NO)₃ are reacting to produce Na₂(SO)₄ and Cu(NO)₃
Explanation:
When we describe a reaction by a chemical reaction, we put the reactants in on the side and the other side the products. A simple arrow (→) represents an irreversible reaction, the double arrow (⇄) represents a reversible reaction (the products are forming the reactants too).
So, for the reaction given, it's irreversible, and the reactants Cu(SO)₄ and Na₂(NO)₃ are reacting to produce Na₂(SO)₄ and Cu(NO)₃.
Answer:
I,II, III
Explanation:
Firstly, the magnitude of nuclear charge affects the first ionization energy of an element. Hence,as effective nuclear charge increases, the attraction between the nucleus and the outermost electron increases and ionization energy consequently increases. Thus Mg has a higher first ionization energy than Be.
Secondly, oxygen has an electron configuration of 1s2 2s2 2p4 while nitrogen has an electron configuration of 1s2 2s2 2p3. Now, recall that extra energy is often associated with half filled orbitals hence nitrogen has a higher first ionization energy than oxygen. Furthermore, the addition of electron to an already half filled 2p orbital in oxygen (pairing) leads to inter electronic repulsion and drastic fall in first ionization energy. Therefore, as we move from nitrogen to oxygen in the periodic table, greater inter-electron repulsion between two electrons in the same p-orbital counter balances the increase in effective nuclear charge hence nitrogen has a greater first ionization energy than oxygen.
Lastly, the 3p orbital is far away from the nucleus hence we expect it to feel less of nuclear attraction than a 2p orbital. Hence the first ionization energy of Ar is less than that of Ne.