GoConqr has a new look! Let us know what you think.

Chemistry (CP)

Module 1 · Text Lab Safety
Module 2 · Text The Scientific Method
Module 3 · Media Law Vs. Theory
Module 4 · Media Accuracy Vs. Precision
Module 5 · Text Sig-Figs and Scientific Notation
Module 6 · Text Matter
Module 7 · Text Displacement
Module 8 · Text Density
Module 9 · Text SI Units
Module 10 · Media Dimensional Analysis
Module 11 · Media The Periodic Table
Module 12 · Text Isotopes You are here
Module 13 · Text Nuclear Reactions
Module 14 · Text Nuclear Fission and Fusion
Module 15 · Text Chemical Vs. Nuclear Reaction
Module 16 · Text Electron Shells
Module 17 · Text Ions
Module 18 · Text Solubility and Conductivity
Module 19 · Media Types of Bonding
Module 20 · Text Chemical Formulas
Module 21 · Text Functional Groups
Module 22 · Text Electron Domains
Module 23 · Text Polarity
Module 24 · Text Chemical Equations
Module 25 · Text Physical Vs. Chemical Change
Module 26 · Text Types of Reactions
Module 27 · Text Moles
Module 28 · Text Solubility and Molarity
Module 29 · Media Miracle Moles
Module 30 · Text Acids and Bases
Module 31 · Media pH and pOH
Module 32 · Text Dilutions
Module 33 · Text Neutralization Reactions and Titrations
Module 34 · Text Mol Ratios
Module 35 · Media Stoichiometry
Module 36 · Text Endothermic and Exothermic Energy Transfer
Module 37 · Text Specific Heat
Module 38 · Media Heating and Cooling Curves and Phase Change
Module 39 · Text Gas Laws and Kinetic Molecular Frequency.

Close the course

Module 12 of 39 · Text

Isotopes

Enyx Jiang

Isotopes

An Isotope is an atom with a different number of neutrons than the number of protons

Symbols: 11/5 B (Boron-11)

top number (11)- mass number
bottom number (5)- atomic number

Example; Carbon will always have 6 protons, but the number of neutrons can change

Carbon-12 (6 protons, 6 neutrons)
Carbon-13 (6 protons, 7 neutrons)
Carbon-14 (6 protons, 8 neutrons)

Average atomic mass is the weighted average of the mass numbers of the isotopes of an element. This is what is listed on the periodic table.
eg. Carbon’s average atomic mass is 12.01

Isotopes

Chemistry (CP)

Instructions

Feedback

What do you think of the new look?