Answer:
Strontium is smaller
Strontium has the higher ionization energy
Strontium has more valence electrons
Explanation:
It must be understood that both elements belong to the same period i.e the same horizontal band of the periodic table
While Rubidium is an alkali metal(group 1) while Strontium is an alkali earth metal(group 2)
Since they are in the same period, periodic trends would be useful in evaluating their properties
In terms of atomic radius, rubidium is larger meaning it has a bigger atomic size
Generally, across the periodic table, atomic radius is expected to decrease and thus Rubidium which is leftmost is expected to have the higher atomic radius
Since strontium belongs to group 2 of the periodic table, it has 2 valence electrons which is more than the single valence electron that rubidium which is in group 1 has
In terms of ionization energy, the atom with the higher number of valence electrons will have the higher ionization energy which is strontium in this case
Answer : 5100 KJ
Explanation : In the given reaction of
we can see that 2 moles of Al is producing -850 KJ of energy
so for 12 moles of Al we can calculate as;
12 moles of Al X
= -
5100 KJ
So, we can say that 12 moles of Al will need -5100 KJ of energy.
Answer:
In the attached photo.
Explanation:
Hello,
You could find the structure in the attached photo, taking into account that the initial (Z) resembles to the trans arrangement for this alkene.
Best regards.
Answer:
0.4777 cm³
Explanation:
Molar mass is defined as the mass of 1 mole of the substance.
The molar mass fo Ag is 107.8682 g/mol
Since, 1 mole of Ag contains 6.022×10²³ molecules of Ag
So,
6.022×10²³ molecules of Ag has a mass of 107.8682 g
Also,
1 molecule of Ag has a mass of 107.8682/6.022×10²³ g
2.8×10²² molecules of Ag has a mass of (107.8682/6.022×10²³)×2.8×10²² g
Mass of 2.8×10²² molecules = 5.0155 g
Given that density = 10.5 g/cm³
Volume = ?
So, volume:
<u>Volume = 0.4777 cm³</u>