Atomic Structure Flashcards
What is the abbreviation for proton and where is it found?
Abbreviation: p or p+
Found: In nucleus
What is the abbreviation for neutron and where is it found?
Abbreviation: n
Found: In nucleus
What is the abbreviation for electrons and where is it found?
Abbreviation: e^-
Found: in the space around the nucleus
Is the nucleus small compared to the electron cloud?
Yes
What is A (circle above A)
Length of unit for very small distances
What is the A (circle above A) for the nucleus?
1x10^-4 A (circle above A)
What is the A (circle above A) for the electron cloud?
1-5 A (circle above A)
What is a protons charge?
+1
What is a protons mass? (AMU)
1.0073
What is a neutrons charge?
None
What is a neutrons mass? (AMU)
1.0087
What is electrons charge?
-1
What is electrons mass (amu)
5.486x10^-4
Which of these has no mass?
- neutron
- proton
- electron
Electron
What does amu stand for?
Atomic mass unit
What is amu?
A unit for very small masses
1amu is how many grams?
1amu=1.66054x10^-24
What is an elements mass number?
Protons plus neutrons
How do you find an elements number of protons?
Look at the periodic table
What is an isotope?
The same element with different number of neutrons
What is relative abundance?
How much of each isotope there is
What is the equation for atomic weight?
Atomicweight= Σ [(isotope mass)x (fractional isotope abundance)]
To find the average mass of atomic weights, Both fractional isotope abundances must add up to?
100%
