2018 Mod13 Flashcards
Write out the definitions for the following terms:
A. Model
A systematic description of a system that account for the noon property
B. Nucleus
The center of an Adam containing the protons and neutrons
C. Atomic number
The Number of protons in an atom
D. Mass number
The sum of the number of neutrons and protons in the nuclear us of an Adam
E. isotopes
Adams with the same number of protons but different number of neutrons
F. Element
A collection of Adams that have the same number of protons
G. Radioactive isotope
And Adam with a nuclear us that is not stable
H. Half-life
The time it takes for half of the original sample of a radioactive isotope to decay
Order the three consistent part of an Adam in terms of their mass, from least massive two most massive
Electron, protons, neutrons
What force keeps the protons and neutrons in the nuclear us,? What causes this force?
The nuclear force.
The exchange of pions in the nuclear us
What force keeps the electronic ordering around the nuclear us?
The electromagnetic force
What is an Adam mostly made of
Empty space
And Adam has an atomic number of 34 how many protons and electrons does it have? What is it symbol?
Protons equals 34 electrons equals 34
Se
Do you atoms are isotopes the first has 18 protons and 20 neutrons the second has 22 neutrons how many protons does the second Adam have
18 protons
What is the largest for all of it in our uranium Adams the symbol for uranium is U and how many electrons are in it?
The pattern for electrons is 2, 8, 18, 32, 50,
So five 32 elections in the past or a bit
