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Why atomic radius of barium is less than atomic radius of caesium?
Wiki User
∙ 11y ago
Both cesium and barium have their outermost electrons in the 6s sublevel, Cs with 1 and Ba with 2, but barium has one more proton in the nucleus than does cesium, and this produces a greater effective nuclear charge and more attraction for the outermost electrons. This in turn pulls the two electrons in the 6s sublevel of barium slightly closer to the nucleus compared to the one 6s electron in cesium.
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoBecause they're two different elements. Elements are distinguished from each other by the number of protons, which is the same as the atomic number - that is to say that the atomic number represents how many protons are in an atom. If one particle has the same number of protons as another, then the conclusion is that the two particles are of the same element. If an atom barium were to have the same number as protons as cesium, then the atom would in fact be cesium, not barium.
Wiki User
∙ 14y agoBecause their atomic number is what makes them different from other elements.
Wiki User
∙ 9y agoThe atomic number of an element is a count of its protons. Each element has a different number of protons, therefore a different atomic number.
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Who has a larger atomic radius Be or O?
N-- Because it has less electrons, the proton pull is smaller on each individual electron, holding them closer to the nucleus and making the radius smaller
How many protons would be present in an atom of barium?
There are four protons. Also four neutrons and four electrons
What happens when sodium sulphate is added to barium nitrate?
If the sodium sulfate and barium nitrate are both in solution in water, a precipitate of barium sulfate will be formed, because this salt is much less soluble in water than barium nitrate, sodium sulfate, or sodium nitrate.
Is francium more or less reactive than cesium?
Francium is considered to be more reactive than caesium.
What has a larger radius a bromine atom or a bromine ion?
That depends: is it a positive ion (Br+) or a negative ion (Br-)? An ion with a charge of +1 has one less electron than the element would have normally. An ion with a charge of -1 has one more electron than normal. It seems kind of strange that -1 means one more, and +1 means one less, but that's because an electron has a charge of -1, so if there is one less electron than is needed to keep the atomic charge balanced, the charge will be positive by 1. Cations (pronounced cat-ions, not cashons), ions with a positive charge and therefore fewer electrons than the neutral atom, have a smaller atomic radius than the neutral atom. Anions, ions with a negative charge and therefore more electrons than usual, have a larger atomic radius than the neutral atom. So a bromine cation would have a smaller radius, and a bromine anion would have a larger atomic radius. NOTE: when referring to a neutral atom, the atom is of THE SAME ELEMENT as the ion. Otherwise, the comparison is not necessarily true.
What is the difference between ammonia clock and caesium clock?
Both are atomic clocks but caesium atomic clock is more accurate as the internal frequency of caesium atom is more accurate and varies less than one part in 10 billion.
How does ionic radius differ from atomic radius?
Ionic radius is greater than atomic radius in a negative ion and less than it in a positive ion.
How does the presence of core electrons affect the atomic radius of elements?
When there is an anion (negative charge) the radius will be larger because it is more full whereas it will be smaller if it is a positive charge because of less electrons. ex largest to smallest radius (K-,K, K+)
This element is the most reactive alkali metal has an atomic number greater than caesium and has one less valence electron than calcium?
This chemical element is francium (Fr).
Within a period what happens to the atomic radius you go down the column?
The atomic radius increases down a column. More electron shells are added and the nucleus had less pulling power on those electrons. decreasesdLo
Atomic radius of silver?
A little bit more than cadmium; a little bit less than palladium.
What is the frequency of caesium atom in atomic clock?
9,192,631,770 Hz and varies less than one tenth of 10 billion second and therefore very accurate and precise to keep time.
Why francium is less metallic than caesium?
'Less metallic'? They are both metals.
Why are caesium have similar chemical properties to francium?
They only need to lose one electron to obtain noble gas configuration and thus it is extremely energetically favorable for them to do this. Rubidium, potassium, sodium and lithium also only need one electron removing. With cesium and francium however, the atoms are much larger making the outer electron much further from the positive nucleus and also shielded by lot more electrons. This makes it extremely easy to remove and thus they are both highly reactive.
Is the electronegativiy of barium larger or smaller than that of strontium?
The electronegativity of barium is less than that of strontium.
How is the radius of an atom related to the atoms attraction for outer level electrons?
As the radius of an atom increases, the attraction between the positively charged nucleus and the negatively charged outer level electrons decreases. This is because the outer level electrons are farther away from the "home base." So, as atomic size (radius) increases, the nucleus has less and less a hold on those outermost electrons. For this reason, cesium (Cs, atomic #55) has very large atomic size and very low electronegativity. Fluorine (F, atomic #9) has very small atomic size but large electronegativity.
What is a reactive metal in table salt?
Metallic character of an element is determined by its ease to lose electrons that is the force of attraction put on the shells by the nucleus should be less. Therefore elements with greater atomic number and present in the last period to the left side is considered to be more metallic. so reactive metals are those that easily lose electrons and react with other elements. eg francium , caesium radium barium
