HomeExplain The Law Of Conservation Of Mass And Law Of Multiple Proportions Using Examples Accordingly Of What Is And Is Not Possible Explain The Evidence (And Associated Experiments) That Lead Us To Adopt The Nuclear Model Of The Atom And Reject The Plum Pudding Model Of The Atom Describe The Generic Structure Of An Atom Calculate The Correct Number Of Subatomic Particles For Any Isotope Of Any Element Calculate The Atomic Mass Of An Element From Information Of Its Isotopes (Mass And Abundance) And Visa Versa Identify The Parts Of The Periodic Table And Explain Why The Periodic Table Has The Form That It Does Explain The Relationship Between Atoms And Ions Name A Substance From Its Formula And Derive Its Formula From Its Name

Explain The Law Of Conservation Of Mass And Law Of Multiple Proportions Using Examples Accordingly Of What Is And Is Not Possible Explain The Evidence (And Associated Experiments) That Lead Us To Adopt The Nuclear Model Of The Atom And Reject The Plum Pudding Model Of The Atom Describe The Generic Structure Of An Atom Calculate The Correct Number Of Subatomic Particles For Any Isotope Of Any Element Calculate The Atomic Mass Of An Element From Information Of Its Isotopes (Mass And Abundance) And Visa Versa Identify The Parts Of The Periodic Table And Explain Why The Periodic Table Has The Form That It Does Explain The Relationship Between Atoms And Ions Name A Substance From Its Formula And Derive Its Formula From Its Name

Substance from Formula:

Formula: H₂O
Name: Water

Deriving Formula from Name:

Name: Sodium Chloride
Formula: NaCl

Law of Conservation of Mass

Definition: Mass is neither created nor destroyed in a chemical reaction.
Example: In a closed system, if 10g of reactants yield 10g of products, mass is conserved.

Law of Multiple Proportions

Definition: When two elements form different compounds, the mass ratios of the elements are simple whole numbers.
Example: CO (carbon monoxide) and CO₂ (carbon dioxide) have a mass ratio of 1:2 for oxygen.

Evidence for Nuclear Model

Experiments: Rutherford's gold foil experiment showed that atoms have a dense nucleus, rejecting the plum pudding model which suggested a diffuse distribution of charge.

Generic Structure of an Atom

Components: Nucleus (protons and neutrons) surrounded by electrons in orbitals.

Subatomic Particles Calculation

Example: Carbon-14 (C-14) has 6 protons, 8 neutrons, and 6 electrons.

Atomic Mass Calculation

Formula: Atomic mass = (mass of isotope₁ × abundance₁) + (mass of isotope₂ × abundance₂).

Periodic Table Structure

Parts: Organized by increasing atomic number, groups (columns) share chemical properties, periods (rows) indicate energy levels.

Relationship Between Atoms and Ions

Definition: Atoms become ions by gaining or losing electrons, resulting in a charge.

Naming and Deriving Substances

Example: NaCl is sodium chloride; derived from sodium (Na) and chlorine (Cl).