When cesium and fluorine meet
In this video, the students will watch a reaction that is very difficult to carry out in a lab: a reaction between cesium and fluorine, and will answer questions related to the two elements in the reaction and to the reaction product
Play Video
Below are a few sentences that refer to the element cesium (Cs). Choose all the correct sentences.
Cesium belongs to the family of alkaline earth metals
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
Cesium is highly electronegative
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
Cesium has one electron on the sixth energy level.
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
Cesium is a very reactive metal, due to the valence electron being far from the atomic nucleus.
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
Cesium has one electron on the fifth energy level.
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
Below are a number of sentences referring to the element fluorine (F). Choose all the correct sentences.
Fluorine belongs to the halogen group.
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
Fluorine is highly electronegative.
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
Fluorine is a highly reactive non-metal, due to the valence electrons being far from the atomic nucleus.
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
Fluorine has seven electrons on the second energy level.
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
Fluorine is a gas at room temperature.
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
Fluorine has seven electrons on the first energy level.
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
Below are a number of sentences related to the reaction between the element cesium (Cs) and the element fluorine (F). Choose all the correct sentences.
The occurring reaction is:
$2Cs_{(1)}+F2_{(g)rightarrow} 2Cs_{}F_{(s)}$
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
In this reaction each fluorine atom receives one electron from a cesium atom.
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
The substance created as a result of the reaction is a molecular compound.
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
The substance created as a result of the reaction is gaseous at room temperature.
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
The substance created as a result of the reaction is an ionic compound.
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
The occuring reaction is:
$Cs_{(1)}+F2_{(g)rightarrow} Cs_{}F2_{(s)}$
Well Done! Partial Correct Answer Correct Answer Incorrect Answer
When cesium and fluorine meet - an interactive video
Play VideoActivity Overview
In this video, the students will watch a reaction that is very difficult to carry out in a lab: a reaction between cesium and fluorine, and will answer questions related to the two elements in the reaction and to the reaction product
Ionic compounds, electronegativity, alkali metals, alkaline earth metals, halogens, energy levels, electron configuration
Knowledge building
Additional content that may interest you
Who Needs Dads?
Are males actually needed for reproduction? Possibly not, but it is certainly easier with them.
Science’s Fight for Life
A measles outbreak due to anti-vaxxer activity, questionable therapists showcased on TV and politicians who do not hesitate to lie and twist facts to serve financial interests. These are only some of the challenges that science had to face in 2018. Is this a lost war?
Evolution by Hurricanes
The answer is blowing in the wind: For the first time, researchers have shown how hurricanes can affect the evolution of lizards –simply by casting those less capable of withstanding the powerful winds into the sea.