Position Of Hydrogen In The Periodic Table
Chapter Name : Hydrogen |
Sub Topic Code : 102_11_09_01_01 |
Topic Name : Position Of Hydrogen In The Periodic Table |
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Sub Topic Name : Position Of Hydrogen In The Periodic Table |
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Introduction
Hydrogen is the first element in the periodic table and is also the
lightest element known. In the normal elemental form, it exists as a diatomic
molecule.
Pre-Requisites:
Alkali metals,
Halogens
Activity:
Hydrogen is one of two important elements found in water (H2O).
Each molecule of water is made up of two hydrogen atoms bonded to one oxygen
atom.
Real Life Question:
What is the most
common compound containing hydrogen..?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Alkali metals | The alkali metals are a group in the periodic table consisting of the chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb),caesium (Cs), and francium (Fr). This group lies in the s-block of the periodic table as all alkali metals have their outermost electron in an s-orbital. |
| Halogens | The group of halogens is the only periodic table group which contains elements in all three familiar states of matter at standard temperature and pressure. All of the halogens are components of acids. The halogens are also all toxic. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Molecular structure model of water | Water contains two atoms of hydrogen bound to an atom of oxygen |
Real life uses :
Hydrogen is used as a hydrogenating agent to
produce methanol and convert unhealthy unsaturated fats and oils to saturated
fats and oils.
Places to visit :
Chemistry lab
Practical examples around us
| Examples | Explainations |
|---|---|
| Hydrogen as a fuel | Hydrogen is commonly used in the petroleum and chemical industries and is also widely used for many physics and engineering applications such as welding or as a coolant. |
What you learn in Theory:
Position of an element in periodic table depends
upon its electronic configuration and properties. Hydrogen resembles the
elements of group I-A, IV-A and VII-A in some respects.
What you learn in Practice:
Hydrogen is a nonmetal. It is placed above group in the periodic
table because it has ns1 electron configuration like the alkali
metals. However, it varies greatly from the alkali metals as it forms
cations (H+) more reluctantly than the other alkali metals.