Essay on Atom

Short Notes-Atomic Structure

Short Notes On Atomic Structure * Atom is the smallest particle of an element- All 117 elements has atoms * Bohr model: – Planetary model (see Figure 1 below) 1. Sun (proton & neutron= nucleus) 2. Planets (electrons) 3. Orbit (shell) Figure 1: Bohr model * Each type of atoms has a certain number of […]

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Molecule

Molecular geometry is the three-dimensional arrangement of the atoms that constitute a molecule. It determines several properties of a substance including its reactivity, polarity, phase of matter, color, magnetism, and biological The angles between bonds that an atom forms depend only weakly on the rest of molecule, I. E. They can be understood as approximately […]

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Chemistry – College

The Scientific Method and Matter The Scientific Method Step 1: Performing Experiments Step 2: Making Observations Step 3: Proposing a Hypothesis Step 4: Confirming the Hypothesis Step 5: Proposing a Scientific Law Scientific Notation It is a mathematical expression in which a number is expressed as N x Anion where N contains only one nonzero […]

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Electronegativity Analysis

This page explains what electronegative Is, and how and why it varies around the Periodic Table. It looks at the way that electronegative differences affect bond type and explains what is meant by polar bonds and polar molecules. If you are interested in electronegative in an organic chemistry context, you will find a link at […]

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Gunshot Residue Aanalysis

When a piece is discharged. residues from the bullet’s force. the primer. cartridge instance. firearm itself and the pulverization from the propellent are expelled from spreads in the guns working parts ( Pepper. 2005: 118 ) . These atoms are known as gunfire residue ( GSR ) or firearm discharge residue ( FDR ) and […]

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Chapters 1-5 Notes Ap Biology

Chapter 1: Biology- The study of life A Hierarchy of Organization 1. Molecules 2. Organelle 3. Cell 4. Tissue 5. Organ 6. Organism Emergent Properties- Novel properties that emerge as each step up the hierarchy of biological order is taken. Reductionism- Reducing complex systems to simpler components that are more manageable to study. Cells- The […]

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Dot Point Notes- Production of Materials

1. Fossil fuels provide both energy and raw materials such as ethylene, for the production of other substances construct word and balanced formulae equations of chemical reactions as they are encountered There are three important steps involved: 1. Show all reactants and all products in the word equation. 2. Write the correct formula for each […]

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Zirconium: Atom and Nearest Noble Gas

Electronic configuration for zirconium is given below: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d2 b. Use the diagram to explain why the Zr4+ ion exists. (2 marks) When the outer orbitals are filled with applicable number of electrons the element tends to becomes chemically stable under normal conditions. Zirconium atomic structure contains […]

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Intro to Boron

Have you ever done the laundry and wondered what was in the detergent you use? Or if you watched a rocket launch into space have you wondered how it can even make it past earth? The answer to those questions is boron (B). Boron is a metalloid element with an atomic number of 5 and […]

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Vanadium – College

Vanadium is a metal that has an atomic mass of 50. 9414 g. mol 1 and an atomic number of 23. It is a soft white substance that can be found with many different minerals. Vanadium has 4 energy levels, the first energy level contains two protons, the second contains 8 protons, the third contains […]

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