All things significant
What are those?
A dozen donuts
Elementally Stable
Bill Nye the Science Guy
100
What digits are always significant?
1-9
100
2.54cm =
1k =
100 centi___ =
1000 milli___
1in
1000___
1___
1___
100
How many meters is 357cm equal to?
Find what we are looking for, given, and conversions.
-looking for: meters
-given: 357cm
-conversion: 100cm = 1m
100
What is the same element with different mass numbers called?
isotopes
100
what is the shell of an atom made of?
what is the nucleus of an atom made of?
electrons
protons and neutrons
200
Is zero really that important?
-leading
-sandwich
-trailing
-NEVER
-for sure
-after a number and a decimal is correct
200
9.3in x 2.54cm/1in = 23.6
is this correct?
NO there are no units it should be 23.6cm
200
Convert 3.4kg to g
3400g
200
Electrons are
protons are
neutrons are
-
+
0
200
who came up with the idea of the cathode ray tube?
JJ Thomson
300
how many SF?
0.001307
4
300
what is this?
6.022E23
Avogadros number
300
Convert 17.3in to meters
0.439m
300
136C
Number of protons, neutrons, and electrons?
6, 7, 6
300
What did the gold foil experiment discover?
there were protons in the nucleus
400
7.43
+11.246
18.68
400
what is the base unit in chem?
400
A liquid occupies 4.43L, how many in3 will the liquid occupy?
270in3
400
What is the nuclide representation for the element Beryllium?
94Be
500
0.0042 x 70.3
0.30
500
ARE UNITS IMPORTANT or should we just assume everything is an elephant?
important!
500
How many feet is 14.35cm?
0.4708ft
500
What are the 7 diatomic elements?
H2, N2, O2, F2, Cl2, Br2, I2