Unit 2 Flashcards
What is an atom?
The smallest particle of an element that retains the chemical properties of that element.
What is the nucleus?
A small region in the center of the atom.
What is a proton’s location?
The nucleus.
What is the symbol of a proton?
p+
What is a proton’s charge
+1
Proton’s mass number
1
Electron symbol
e-
Electron charge
-1
Electron mass number
0
Electron location
Electron cloud
Neutron symbol
n0
Neutron charge
0
neutron mass number
1
neutron location
nucleus
mass number
number of protons plus number of neutrons in the nucleus
positively charged ion
cation (pawsitively charged)
negatively charged ion
anion (onion makes you cry)
when an atom loses electrons
becomes a cation
when an atom gains electrons
becomes an anion
isotope is
atom with the same number of protons but different number of neutrons
atomic number stays the same but mass number changes
relative atomic mass is
the comparison of masses of atoms against each other
what is the standard atomic mass
Carbon-12
average atomic mass
weighted average of the masses of every naturally occurring isotopes of the element
what mass is listed on the periodic table
the average atomic mass
how to find average atomic mass
[(mass# isotope1)(relative abundance)]
[mass# isotope2)(relative abundance)
+ _________________________
total is average atomic mass
Percent abundance formula
(1st isotope mass)(1st isotope percent abundance) + (2nd isotope mass)(2nd isotope percent abundance - 1st isotope percent abundance) = average mass of element
