0
it is softer
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
Which has the smallest radius K Rb K Rb?
Potassium's atomic radius is smaller than rubidium's because potassium has fewer energy levels of electrons.
What element is harder than gold but softer than copper?
it is silver
Is coal harder or softer than rock?
Coal is considered to be a rock.
Is francium harder or softer than sodium?
The hardness of francium is not known.
Which is harder silver or gold?
Silver is softer than 18K gold.
What is a form of calcium carbonate softer than marble but harder than chalk?
Limestone is softer than marble, but harder than chalk.
Is a No. 1 pencil harder or softer than a No. 2 pencil?
It's softer. #1 softest, #2 slightly harder, #3 harder than #2, etc.Softer.a #1 pencil is softer than a#2 pencil
Does rubidium have a higher melting point than potassium?
LOWER
Which has the smallest radius K Rb K Rb?
Potassium's atomic radius is smaller than rubidium's because potassium has fewer energy levels of electrons.
What is softer then enamel but harder than cementum?
DENTIN
What mineral is harder than gypsum but softer than flourite?
calcite
What element is harder than gold but softer than copper?
it is silver
What is softer than quarts but harder than apatite?
It has kool in it
Is diamond softer or harder than rock?
Harder..One of the hardest things in the natural world.
Why sodium is more reactive than potassium?
The atomic radius of potassium is greater than that of sodium. Therefore, the single valence electron that exists for all alkali metals is located farther from the nucleus for potassium than sodium. This results in less energy required to remove that valence electron from potassium than from sodium, leading to increased reactivity. Note that this trend continues as you move down Group I on the Periodic Table, meaning that Rubidium is more reactive than Potassium and Cesium is more reactive than Rubidium.
Why is the lattice energy of potassium bromide more exothermic than the lattice energy of rubidium iodide?
The lattice energy of potassium bromide is more exothermic than the lattice energy of rubidium iodide because lattice energy is inversely proportional to atomic radius.
Is potassium more reactive than rubidium?
No, rubidium is more reactive than potassium. The explanation for this is that rubidium has its single electron farther from the nucleus, where it is more easily removed. However, rubidium is also radioactive, so it is not often studied.
