Isotopes and Average Atomic Mass & Nuclear chemistry

Question 1

proton

Answer 1

1920
rutherford
nucleus
positive
mass of 1 amu

1p
1

Question 2

electron

Answer 2

1897
thompson
orbitals
negative
~0 amu

0e
-1

Question 3

neutron

Answer 3

1932
chadwick
neutral
1 amu
nucleus

1n
0

Question 4

e
what is the atomic mass?

Answer 4

represents weightened average of all of the isotopes for that element

Question 5

what is nuclear chemistry?

Answer 5

changes that take place during nucleua of atoms

Question 6

what ia radioactivity ?

Answer 6

term to describe the spontaneous emission of particles or electromagnetic radiation from an unstable nucleus

Question 7

elementary particles

Answer 7

proton - 1p1
electron - 0e-1
neutron - 1n0
beta - 0e-1
alpha - 4He2
positron - 0e+1
gamma - y

Question 8

types of decay

Answer 8

alpha decay - 4He2
beta Decay - in products, 0e-1
positron emmission - 0e+1
Electron capture - in reactants, 0e-1
gamma emission - 0Y0

Question 9

What things stand for in half-life formula

Answer 9

N(t) = amount after time elapsed
N(o) = amount to begin with
t = time elapsed
t(1/2) = half-life