Significant figures
·
All certain digits &1 estimated
Huds :
all #'s
i
non zero
all zeros bounded by non Zeros
= -2004
-
3)
leading zeros X =
4)
trailing zeros -only =
if decimal
5) NX10 all (N) are v 103 =
X
Addition & Subtraction
·
rounded to least # of decimal places
ex : 15 2
.
+ 15 02 .
=2* .
Multiplication & Division
·
rounded to # of least sig .
figs
eX : 7 3 .
↑
, Neutrons
·
discovered by James Chadwick
·
Neutron =
glue /holds p"together)
no
charge
·
Simplified Model >
-
Bohr+ Neutrons
·
in nucleous
eX : Carbon
· ⑨
25 ye
Counting
natia
atomic
particles
# protons = atomic #
electrons = atomic #
#
# of neutrons atomic mass-atomic # =
( ex =
B10 .
81 -
5 =
5 81
.
↳
·
All certain digits &1 estimated
Huds :
all #'s
i
non zero
all zeros bounded by non Zeros
= -2004
-
3)
leading zeros X =
4)
trailing zeros -only =
if decimal
5) NX10 all (N) are v 103 =
X
Addition & Subtraction
·
rounded to least # of decimal places
ex : 15 2
.
+ 15 02 .
=2* .
Multiplication & Division
·
rounded to # of least sig .
figs
eX : 7 3 .
↑
, Neutrons
·
discovered by James Chadwick
·
Neutron =
glue /holds p"together)
no
charge
·
Simplified Model >
-
Bohr+ Neutrons
·
in nucleous
eX : Carbon
· ⑨
25 ye
Counting
natia
atomic
particles
# protons = atomic #
electrons = atomic #
#
# of neutrons atomic mass-atomic # =
( ex =
B10 .
81 -
5 =
5 81
.
↳
