Chemistry Unit 3 - The Atom and the Periodic Table
0.0(0)
Studied by 0 people
Learn
Practice Test
Spaced Repetition
Match
FlashcardsCard Sorting
1/18
Study Analytics
Name | Mastery | Learn | Test | Matching | Spaced |
|---|
No study sessions yet.
19 Terms
1
New cards
Atomos
“Not to be cut”
2
New cards
Democritus
\- Greek philosopher
\
\- Matter could not be divided into smaller and smaller
“a tomos”
\
\- Matter could not be divided into smaller and smaller
“a tomos”
3
New cards
John Dalton
\- “Atomic Theory of Matter”
4
New cards
J. J. Tompson
\- Discovered the electron (cathode rays)
\
\- Plum Pudding Model
\
\- Plum Pudding Model
5
New cards
Lord Ernest Rutherford
\- Gold Foil experiment
\
\- Found the nucleus
\
\- Found the nucleus
6
New cards
Niels Bohr
\- Bohr Model (2,8,8,18)
\
\- Electrons move in definite orbits
\
\- Electrons move in definite orbits
7
New cards
James Chadwick
\- Discovered the neutron
8
New cards
Dmitri Mendeleev
Made the basic formula for the periodic table
9
New cards
Periods
Run horizontally across the Periodic Table
10
New cards
Group
Contain elements with similar attributes
11
New cards
Group 1 - Alkali Metals
\- Very reactive (most reactive group)
12
New cards
Group 2 - Alkaline-Earth Metals
\- Very reactive
13
New cards
Groups 3-12 - Transition Metals
\- Higher density
\
\- Good conductors of heat and electricity
\
\- Good conductors of heat and electricity
14
New cards
Group 13 - Boron Group
\- Solid at room temp.
15
New cards
Group 14 - Carbon Group
\- Solid at room temp.
16
New cards
Group 15 - Nitrogen Group
\- All but Nitrogen are solid at room temp.
17
New cards
Group 16 - Oxygen Group
\- All but Oxygen are solid at room temp.
18
New cards
Group 17: Halogens
\- Poor conductors of electric current
19
New cards
Group 18 - Noble Gases
\- Least reactive group
\
\- All found in atmosphere
\
\- All found in atmosphere
Note 
Flashcards (21)