2.5 Isotopes Flashcards
1
Q
What element did Dalton select as his standard?
A
Hydrogen
2
Q
Mass vs Weight
A
– quantity of matter, constant
– pull of gravity, varies
3
Q
What standard is the atomic mass for each element on the Periodic Table based on?
A
carbon-12
4
Q
Isotopes of an element display __ neutron numbers and mass numbers
A
different
5
Q
Varying the neutron count produces a different __ of the element
A
isotope
6
Q
How do you find the mass #?
A
protons + neutrons
7
Q
In nuclear notation, what is never substituted in place of something else?
A
Atomic mass is never substituted in place of mass #
8
Q
Define Atomic Mass
A
avg weight mass of an element’s isotopes
