Chapter 5.1(part of 5.2) Flashcards
1
Q
1 Dalton
A
- 1800
- 1st person to publish the list of elements
- put them in order of weight from lowest –> highest
2
Q
2 Berzelius
A
- coming up with the accurate atomic weights
- wanted to organize the elements more accurately than Dalton
- Glass blowing guy
- Discovered Silicon
3
Q
3 Dobereiner
A
- DIDNT look at elements by their weight
- Observed elements by chemical properties
- Created triads(groups of 3)
*Problem: not all of the chemicals were grouped at all or grouped improperly b/c is doesn’t work in every element
4
Q
4 Bunsen
A
- invented:
*bunsen burner
*spectrascope - comes up with a new way to find and identify elements
5
Q
5 Newlands
A
- Law of Octaves(1864)
*every eighth element has similar properties - concept is still used today just not in eighths
6
Q
6 Mendeleev
A
- published 1st periodic table (1869)
- missing a whole group still (noble gases)
7
Q
7 Ramsey
A
- Made leap discovery of noble gases
*added them as a group - discovered heium, krypton, xenon, and neon
8
Q
8 Moseley
A
- Introduces the atomic number
- can’t have half of a proton. so nothing in between
- could only be 92 elements
- his 1st periodic table(1913)
9
Q
who published the 1st list of the elements?
A
Dalton
10
Q
who was the glass blowing guy?
A
Berzelius
11
Q
Who was the 1st person to observe elements by their chemical properties?
A
Dobereiner
12
Q
Who tried to organize the elements into triads?
A
Dobereiner
13
Q
Who invented the Bunsen burner?
A
Bunsen
14
Q
Who invented the spectroscope?
A
Bunsen
15
Q
Who created the law of octaves?
A
Newlands
16
Q
what was the law of octaves?
A
every eighth element had similar properties
17
Q
who was the 1st periodic table published by?
A
Mendeleev
18
Q
what group was missing from Mendeleev’s periodic table?
A
Noble gases
