Chapter 4:3 distinguishing among atoms Flashcards
Why are elements different?
Different numbers of protons
What is the atomic number?
Number of protons
What equals the number of protons?
The number of electrons
Where is the mass concentrated?
In the nucleus
What is the total number of protons and neutrons?
The mass number
What is the formula to find the number of n•?
Number of n•= mass #- atomic #
How do atoms of the same element differ?
They have a different number of neutrons
What is mass #?
Protons and neutrons
What is different about isotopes besides having a different number of neutrons?
Different mass _#
Does the atomic number change when it’s an isotope?
No
What is hydrogen2 called?
Deuterium
What is hudrogen3 called?
Tritium
What determines tiny masses?
Mass spectrometer
An atomic mass unit is what of the mass?
1/12
What makes up the nucleus?
P+ and n•
What is the atomic mass?
The weighted average mass
