ISOTOPES Flashcards
Positively Charge
Proton
Negatively charge
Electron
Neutral
Neutron
What are the three basic laws of matter?
- Law of Conservation of Mass
- Law of Definite Proportions
- Law of Multiple Proportions
A chemical reaction mass is neither created nor destroyed but can be transformed from one form to another
Law of Conservation of Mass
The mass of the products equals the mass of the reactants
Law of Conservation of Mass
Law of Conservation of Mass is outlined by
Antoine Laurent Lavoisier
A chemical compound always contains exactly the same proportion of elements by mass
Law of Definite Proportions
Law of Definite Proportions was established by
Joseph Proust
States that the mass of one element that can combine with a fixed mass of another element are in a ratio of small whole numbers
Law of Multiple Proportions
When elements combine, and the ratios of the elements are not the same (CO to CO2 , ratio: 1:2)
Law of Multiple Proportions
Are atoms of the same element but have different mass numbers
Isotopes
Symbol A is
Mass Number
Symbol Z is
Atomic Number
Symbol X is
symbol of the Element
It is equal to the number of protons + neutrons
Mass Number
It is Equal to the number of Protons
Atomic Number
How can we name an Isotope?
By writing the name of the element followed by a hyphen and the mass number (Sodium-11)
How to solve for Atomic Mass
Z x %
where in % must be in decimal form
How to solve for the Average Atomic Mass
use the formula Z x % then Add all these amounts together
