PNE. Protons Neutrons Electrons. A positively charged subatomic particle ( found in the nucleus ). Proton. Neutron. A subatomic particle with no charge (found inside the nucleus ). Atomic Number.
PNE . . .
A positively charged subatomic particle (found in the nucleus).
A subatomic particle with no charge (found inside the nucleus).
The number of protons in the nucleus of an atom of that element. (This is also the number of electrons)
Mass number is the number of protons and neutrons in the nucleus of an isotope.
Mass # = p+ + n0
Isotopes are atoms of the same element that have diff. masses because of diff. numbers of neutrons.
Warm Up 9/16
If you have a 65 formative average and a 72 summative average, what would your grade be?
Avg. Atomic Masses
Atomic mass is the average of all the naturally occurring isotopes of that element.
Carbon = 12.011
What is the average atomic mass of Lithium if 7.42% exists as Li and 92.58% exists as Li?
Find the average atomic mass:
78.70% Mg, 10.03% Mg, 11.17% Mg