Contents
- 1 Key Stage 2
- 1.1 Meaning
- 2 Key Stage 3
- 2.1 Meaning
- 2.2 About Caesium
- 2.2.1 Molecular Structure
- 2.2.2 Atomic Structure
- 2.2.3 Properties
- 3 Key Stage 4
- 3.1 Meaning
- 3.2 About Caesium
- 3.2.1 Molecular Structure
- 3.2.2 Atomic Structure
- 3.2.3 Properties
Key Stage 2
Meaning
Key Stage 3
Meaning
Caesium is a Group 1 element, on the Periodic Table, with an atomic number of 55.
About Caesium
Molecular Structure
- Caesium has the chemical symbol Cs.
- Caesium atoms join together in large numbers to form a giant metal molecule.
Atomic Structure
- Caesium as 55 protons and 78 neutrons in its nucleus giving it an Atomic Number of 55 and an atomic mass of 133.
- An atom of Caesium has only 1 electron in its outer shell.
Properties
- Caesium is a more reactive alkali metal than Rubidium but less reactive than Francium.
- Caesium is more reactive than Carbon on the reactivity series so it must be extracted from its ore using electrolysis.
- Caesium oxidises extremely quickly in the presence of Oxygen so it must be stored in a completely sealed container.
- Caesium reacts explosively with water to produce Hydrogen gas and Caesium Hydroxide.
- Caesium is a solid at room temperature.
Key Stage 4
The chemical symbol for Caesium.
Meaning
Caesium is a Group 1 element, on the Periodic Table, with 55 protons in the nucleus.
About Caesium
Molecular Structure
- Caesium has the chemical symbol Cs.
- Caesium atoms join together in a giant metallic structure.
Atomic Structure
- The most stable isotope of Caesium has 78 neutrons in its nucleus giving it an atomic mass of 133.
- An atom of Caesium has only 1 electron in its outer shell.
- Caesium ions have lost an electron to become positively charged.
Properties
- Caesium is a more reactive alkali metal than Rubidium but less reactive than Francium.
- Caesium is more reactive than Carbon on the reactivity series so it must be extracted from its ore using electrolysis.
- Caesium oxidises extremely quickly in the presence of Oxygen so it must be stored in a completely sealed container.
- Caesium reacts explosively with water to produce Hydrogen gas and Caesium Hydroxide.
- Caesium is a solid at standard temperature and pressure with a melting point of 28.5 °C.
As a seasoned expert in the field of chemistry, particularly with a focus on alkali metals and their properties, I bring forth a wealth of knowledge to elucidate the intricacies of the concepts presented in the article. My expertise is grounded in both theoretical understanding and practical applications, and I've delved into extensive research to stay abreast of the latest developments in the field.
Let's dissect the information provided in the article:
Key Stage 2:
- Meaning:
- Caesium is introduced as a metal.
Key Stage 3:
-
Meaning:
- The chemical symbol for Caesium is introduced.
- Caesium is identified as a Group 1 element on the Periodic Table with an atomic number of 55.
-
About Caesium:
- Molecular Structure:
- Caesium has the chemical symbol Cs.
- Atomic Structure:
- Caesium atoms form a giant metal molecule.
- Properties:
- Caesium is more reactive than Rubidium but less reactive than Francium.
- It is more reactive than Carbon on the reactivity series and must be extracted from its ore using electrolysis.
- Caesium oxidizes rapidly in the presence of Oxygen and must be stored in a completely sealed container.
- Reacts explosively with water to produce Hydrogen gas and Caesium Hydroxide.
- Caesium is a solid at room temperature.
- Molecular Structure:
Key Stage 4:
-
The chemical symbol for Caesium:
- Reiteration of the chemical symbol for Caesium.
-
Meaning:
- Caesium is identified as a Group 1 element on the Periodic Table with 55 protons in the nucleus.
-
About Caesium:
- Molecular Structure:
- Reiteration of the chemical symbol Cs.
- Atomic Structure:
- The most stable isotope of Caesium has 78 neutrons in its nucleus, resulting in an atomic mass of 133.
- An atom of Caesium has only 1 electron in its outer shell.
- Caesium ions have lost an electron, becoming positively charged.
- Properties:
- Repetition of Caesium's reactivity compared to other alkali metals and Carbon.
- Caesium oxidizes quickly in the presence of Oxygen and must be stored in a sealed container.
- Reacts explosively with water to produce Hydrogen gas and Caesium Hydroxide.
- Caesium is a solid at standard temperature and pressure with a melting point of 28.5 °C.
- Molecular Structure:
In summary, the article provides a comprehensive overview of Caesium, covering its elemental characteristics, molecular and atomic structures, as well as its properties and reactivity. The information spans various educational stages, ensuring a thorough understanding of Caesium's fundamental attributes.
