ATOMS AND MOLECULES

DALTON’S ATOMIC THEORY

Created byVinay Arya

Last updated 10/2019

English

What you'll learn

INTRODUCTION TO ATOMS, DALTON’S ATOMIC THEORY, ATOMS, ATOMIC MASS, IONS, MOLE CONCEPT

Course content

1 section • 11 lectures • 2h 12m total length

3.1. CONTENTS13:28
Explore atoms and molecules as the building blocks of matter, and master the laws of chemical combination, atomic structure, symbols, ions, and the formation of ionic and molecular formulas.
3.2. INTRODUCTION TO ATOMS11:09
Explore atoms and molecules through the three laws of chemical combination: conservation of mass, constant (definite) proportions, and multiple proportions, with examples like carbon monoxide and carbon dioxide.
3.3. DALTON’S ATOMIC THEORY11:05
Explore dalton’s atomic theory: atoms as indivisible building blocks, identical within elements, combining in fixed ratios to form compounds, and the theory’s limitations revealed by isotopes and subatomic particles.
3.4. ATOMS14:38
Explore atoms and ions, electron configurations, and bonding basics, including ionic and covalent compounds, atomic radius, and chemical symbols with examples like neon and potassium.
3.5. ATOMIC MASS14:39
3.6. IONS13:16
3.7. DEMONSTRATION ON IONS9:23
Explore the demonstration of ions, showing how atoms gain or lose electrons to form positively or negatively charged ions, and how atomic number and electron transfers create charge.
3.8. IONIC COMPOUND9:55
Explore ionic compounds formed by cations and anions, and write formulas by criss-crossing charges. Use examples like sodium chloride and aluminum phosphate to show charge balance.
3.9. MOLE CONCEPT9:41
3.10. CALCULATIONS ON MOLES14:32
3.11. DETERMINATION OF MOLECULAR FORMULA11:07
Explore empirical and molecular formulas from percent composition and molar masses. The lecture covers dividing by atomic masses, finding the simplest ratio, and scaling to the molecular formula with examples.
Innovation

Requirements

Basics Chemistry

Description

The structure of matter has been a subject of speculation from very early times. According to Greek philosopher Democritus, if we go on dividing matter into smaller parts, a stage would be reached when particles obtained cannot be divided further. He called these particle as ‘atoms’ meaning indivisible.

All matter is made up of small particles called atoms. Different kinds of atoms and molecules have different properties due to which different kind of matter also show different properties.

Laws of chemical combination : By studying the result of quantitative measurement of many reactions it was observed that whenever substances react, they follow certain laws. These laws are called the law of chemical combination. They are

(a) Law of conservation of mass.

(b) Law of constant proportions.

Dalton's Atomic Theory: According to this theory, all matter whether element, compound or mixture is composed of small particles called atoms. The theory proposed by Dalton may be stated as follows:

(i) All matter is made up of atoms.

(ii) Atoms are tiny, indivisible and in destructive ultimate particles.

(iii) Atoms of a given element are identical in mass and chemical properties.

(iv) Atoms of different elements have different masses and chemical properties.

(v) Atoms combine in the ratio of small whole number to form compounds.

(vi) Atoms are neither created nor destroyed.

Who this course is for:

Beginners, 9 grade students and research Scholars