Does S or O have a larger atomic radius?
Consequently for the neutral atoms, S would be larger than O. For the sulfide ion, reinforcing this effect is the large, excess 2- charge that greatly increases the radius of S2- as compared with the neutral S atom.
Is Cl or Br bigger?
As Br is smaller than Cl; therefore, Br- have a smaller ionization energy than Cl-. In short, since the outermost electron in bromine is farther from the nucleus than the outermost electron in chloride, it takes less energy to remove the outermost electron in bromide.
What is the smallest atom?
helium
Why is cesium The biggest atom?
Why are cesium atoms so big? Cesium has a large valence shell and a relatively low effective nuclear charge. The valence shell (the outer ‘peel’ of the atom) is largest in atoms at the bottom of the periodic table. A low nuclear charge means that electrons can wander further, on average, from the nucleus.
What elements have the most atoms?
Helium has the most number of mol out of all the options and will thus have the highest number of atoms. Look up the atomic weight (in grams per mole) of each of these 5 elements, and divide the given mass of the element by its atomic weight. That gives the number of moles of each element.
What element has the largest mass?
It is one of only two elements named after a person who was alive at the time of naming, the other being seaborgium, and the only element whose namesake is alive today. Oganesson has the highest atomic number and highest atomic mass of all known elements.
Why francium is smaller than cesium?
atomic radius of francium is smaller than cesium due to relativistic effect. the relativistic effects on d & f orbitals are small due to less electron density near the nucleus. shielding effect of s & p orbitals cancel the effect of increased nuclear charge on d& f orbitals.
Is francium more reactive than lithium?
The reactivity of alkali metals increases from the top to the bottom of the group, so lithium (Li) is the least reactive alkali metal and francium (Fr) is the most reactive.
What does francium mean?
: a short-lived radioactive element of the alkali-metal group occurring naturally as a disintegration product of actinium and also produced artificially — see Chemical Elements Table.
What color is francium?
Data Zone
| Classification: | Francium is an alkali metal |
|---|---|
| Color: | silver-gray-metallic (presumed) |
| Atomic weight: | (223), no stable isotopes |
| State: | solid |
| Melting point: | 27 oC , 300 K |
Can francium kill you?
Edit. Francium is a very unstable metal. Francium has a silvery, and gray color to it. No one has tasted francium because francium is very rare and it would kill you.
Is francium a bomb?
Nuclear weapons depend on initiating a chain reaction of nuclear fission, which is not possible with francium. Unlike the fission chain reaction of uranium or plutonium in a nuclear bomb, which depends on conditions that the bomb creates, radioactive decay is spontaneous and cannot be regulated.
Why is francium so rare?
This is due to the distance of its electrons from the nucleus and its atomic number. What is more, francium is the rarest element that occurs in nature but one. The most rarely occurring one is astatine. This element is extremely radioactive and decays into radon, radium, and astatine.