Atoms Flashcards
What are Isotopes
Are atoms that have the same number of protons, but different numbers of neutrons in their nuclei.
Proton Mass
1
Neutron Mass
1
Electron Mass
1/1820 or 1/2000
Proton Charge
Positive or 1+
Neutron Charge
Neutral or no charge
Electron Charge
Negative or 1-
Proton Location
Nucleus
Neutron Location
Nucleus
Electron Location
In shells around the nucleus
Where is the atomic number located on the periodic table?
It is the bottom/smallest number on an element.
Where is the Mass number located on the periodic table
The top/largest number on an element.
What is the Mass number made up of?
N.O of Protons + N.O of Neutrons
Why do atoms have an equal number of electrons and protons?
Because they need to be neutral.
Fact
Atomic number = Proton number
Fact
Proton number gives you your identity of an atom.
Do isotopes of the same element always have the same or different atomic masses?
Different
Isotopes important facts:
Same atomic number
Same N.O pf protons
Diff mass numbers
Diff N.O of neutrons
What can make an atom unstable?
Having an extra amount of neutrons
Isotopes properties
Isotopes of the same element can have different physical properties, E.G: Density.
Isotopes of the same element always have the same chemical properties
How to calculate RAM (Relative Atomic Mass)
RAM = (% of isotope A x mass of isotope A) + (% of isotope B x mass of isotope B). All divided by 100.
Periodic table periods and groups
The period is the rows. (Horizontal)
The group is the columns. (Vertical)
RAM Defenition
Weighted mean mass of an atom of an element compared to 1/12 of a carbon atom.
