Module 2 Chapter 1- Atoms And Isotopes(pt. 1) Flashcards
Define isotopes
Atoms of the same elect with diff numbers of neutrons and diff masses
Does isotopes have the same properties as each other
Same no. electrons in the outer shell so reacts in the same way (same chemical properties)
Diff mass no. = diff physical properties
E.g higher mass isotope = higher mp + bp
Equation of ram
Ram = (mass of each isotope X relative abundance) etc/ 100
Define ram
Weighted mean mass of an atom compared with 1/12 mass of C 12
What’s difference of formula mass and relative molecular mass?
Formula = giant structure
Molecular = simple molecule
Define relative molecular mass
The relative weighted mass of a molecule relative to 1/12 of C12
Define relative formula mass
The weighted mass of the simplest ratio of elements in a giant structure relative to 1/12 of C12
( covalent or ionic)
What does the mass spectrum tell us?
tell us relative abundance and the m/z ratio (rim) of each isotope
Can use to find ram
What changes the amount an ion is deflected?
Mass
Charge
What do we assume the m/ z value is
1+ ion (so m/z value gives you the mass)
What is a compound
compound - a substance that is composed of two or
more separate elements
What is a molecule
A group of atoms bonded together representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction
What is an ion
An atom or molecule with a net electric charge due to loss or gain of one or more electrons
What compounds end with “ides”
Binary compounds- composed of two elements
What compounds end with “ates “
Polyatomic compound- made of metal, nmetal, oxygen
Complex ion with 1+ charge
Ammonium NH4
Complex ion with 1- charge
Hydroxide OH
Nitrate NO3
Complex ion with 2- charge
Carbonate CO3
Sulfate SO4
Why does isotopes of an element have the same chemical properties
Same number of electrons in outer shell
Or same electron configuration/ structure
What’s the relative mass of electron
Negligible or 1/1836
Charge of zinc ion
2+
Charge of silver ion
1+
