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Research draft

alkali metal

vr.tr.alkali-metal · PHY.MAT

Let an agent explain the alkali metals and their properties, relay trends, reactions and uses from chemistry references at a public level, describe the predicted heavier members, and distinguish alkali metals from alkaline earth metals, from hydrogen in group 1 and from alkalis as bases.

Thing Registry Physical world and living systems

Research draft, second pass

A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.

written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify

Researched by: Claude

Purpose and description

Let an agent explain the alkali metals and their properties, relay trends, reactions and uses from chemistry references at a public level, describe the predicted heavier members, and distinguish alkali metals from alkaline earth metals, from hydrogen in group 1 and from alkalis as bases.

Any of the chemical elements of group 1 of the periodic table, lithium, sodium, potassium, rubidium, caesium and francium, soft, highly reactive metals with one valence electron that react vigorously with water to form alkaline hydroxides, with the undiscovered elements ununennium, element 119, and unsepttrium, element 173, predicted to belong to the group; alkali metals are stored under oil or inert gas and are essential in batteries, chemistry and biology.

What it is for: Not applicable; an element group.

It can be explain the group; relay properties and trends; describe predicted elements; distinguish related concepts.

Distinguishing features

One valence electron

Highly reactive

Soft and low density

Alkaline hydroxides

What it looks like

Soft, silvery metals that tarnish quickly in air.

Physical character

members: 6 known count

reactivity: increases down the group note

caesium melting point: about 28.5 C

ununennium: element 119, not yet synthesised note

How it is recognised

Group 1 metals with one valence electron

Lithium, sodium, potassium, rubidium, caesium, francium; predicted ununennium and unsepttrium

Alkaline earth metals are group 2; hydrogen is a non-metal in group 1; alkalis are bases

Related models

is a kind of - in registry terms

metal

is a kind of - in registry terms

water-reactive substance

is contrasted with - group 2

alkaline earth metal

is exemplified by - the most familiar member

sodium

In practice

Families and kinds

lithium

sodium

potassium

rubidium

caesium

francium

predicted ununennium and unsepttrium

Standards and regulation

Hazardous materials rules for storage and transport

IUPAC nomenclature for undiscovered elements

Failure modes and hazards

Fire and explosion on contact with water

Confusing with alkaline earth metals or alkalis

Registry aliases naming hypothetical elements

Also called

unsepttriumununennium

Where this came from

wikidata · CC0 1.0

Source repository Registry entry point

Also registered as vr.tr.alkali-metal

Drafted structure

Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.

Understand What alkali metals are.

Science.

Definition

Definition.

Definition

Definition.

  1. What are the alkali metals, and how do they differ from alkaline earth metals, hydrogen and alkalis? definition
  2. Is the question about the group, an element, reactions or predicted elements? boundary

Members

Members.

Members

Members.

  1. What are lithium, sodium, potassium, rubidium, caesium, francium and the predicted ununennium and unsepttrium? definition
  2. Which entry fits the specific element? action
Chemistry Chemistry.

Science.

Trends

Trends.

Trends

Trends.

  1. How do atomic radius, ionisation energy, reactivity and melting point vary down the group? provenance
  2. Which references are standard? provenance

Reactions

Reactions.

Reactions

Reactions.

  1. How do alkali metals react with water, halogens and oxygen? provenance
  2. Which sources are cited? provenance
Uses Uses and safety.

Application.

Uses

Uses.

Uses

Uses.

  1. How are alkali metals used in batteries, atomic clocks, medicine and industry? provenance
  2. Which entry fits lithium-ion battery? action

Safety

Safety.

Safety

Safety.

  1. How are alkali metals stored and handled safely, as regulators describe? provenance
  2. Which entry fits hazardous material? action
Context History and frontiers.

Context.

History

History.

History

History.

  1. How were the alkali metals discovered, from Davy s electrolysis to francium? provenance
  2. Which entry fits the history of the periodic table? action

Frontiers

Predicted elements.

Frontiers

Frontiers.

  1. What is predicted for ununennium and unsepttrium, and how are they sought? provenance
  2. Which entry fits extended periodic table? action

What the second pass must settle

  • Should ununennium be a separate primary entry?
  • How should chemistry references be linked?
  • The registry entry has merged aliases naming hypothetical elements; should they be split off?
Draft as JSON