Lesson Notes By Weeks and Term - Senior Secondary 2

Nitrogen I

Get it on Google Play
Get it on the Apple App Store
  1. Home
  2. Lesson Notes By Weeks and Term
  3. Senior Secondary 2
  4. Nitrogen I

TERM: 2ND TERM

WEEK EIGHT

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 5 periods each

Date:        

Subject: Chemistry

Topic:  NITROGEN 1

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

  1. Identify the properties of Nitrogen family group
  2. Explain and carry out the laboratory preparation of Nitrogen.

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S ACTIVITY

STEP 1

INTRODUCTION

The teacher discusses the Nitrogen family group of elements.

Students pay attention

STEP 2

EXPLANATION

Teacher carry out laboratory practicals on the preparation of nitrogen.

 

Students pay attention and participates

STEP 3

NOTE TAKING

The teacher writes a summarized note on the board

The students copy the note in their books

 

NOTE

NITROGEN 1

Nitrogen is a chemical element with the symbol N and atomic number 7. It is a diatomic gas at room temperature, meaning it exists as N2, where two nitrogen atoms are bonded together. Nitrogen makes up about 78% of Earth's atmosphere, making it the most abundant gas in the atmosphere.

General properties of nitrogen group V elements.

The nitrogen group, also known as Group 15 or the pnictogens, includes nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi). Here are some general properties of the nitrogen group:

  1. Number of Valence Electrons:

   - Members of the nitrogen group have five valence electrons.

  1. Physical States:

   - Nitrogen and phosphorus can exist in various physical states. Nitrogen is a diatomic gas (N2), while phosphorus can exist as various allotropes, including white phosphorus (P4) and red phosphorus.

   - Arsenic, antimony, and bismuth are solid at room temperature.

  1. Ionization Energy:

   - Ionization energy decreases down the group, making it easier for these elements to lose electrons and form positive ions.

  1. Electronegativity:

   - Electronegativity generally decreases down the group. Nitrogen has the highest electronegativity among the group members.

  1. Formation of Hydrides:

   - All members can form hydrides. For example, ammonia (NH3) is the hydride of nitrogen, and phosphine (PH3) is the hydride of phosphorus.

  1. Formation of Oxides:

   - Nitrogen forms oxides such as nitrogen monoxide (NO) and nitrogen dioxide (NO2). Phosphorus forms phosphorus pentoxide (P4O10).

   - The oxides of arsenic, antimony, and bismuth exhibit acidic properties.

Laboratory Preparation of Nitrogen.

Nitrogen gas (N2) is typically obtained in the laboratory through various methods, often involving the removal of oxygen and other gases from the air. One common method is the displacement of oxygen using another gas. Here's a simple method:

 

EVALUATION: - Identify 5 properties of Nitrogen family group of elements.

                          - Discuss briefly, the laboratory preparation of Nitrogen.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively