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A
N
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100
6 C carbon 19.1 What does the 6 represent? What does the C represent? What does carbon represent? What does 19.1 represent?
1. The atomic number 2. chemical 3. element name 4. atomic mass
100
What's the proton symbol?
P+
100
Neutron symbol?
N
100
Electron symbol?
E-
100
What is the charge of the proton and where did it live? What amount of atomic mass unit?
Charge is positive and it is found in the nucleus. 1 AMU
200
Neutrons charge? AMU? Where is it found?
No charge and AMU of one, found in nucleus
200
Electron found? AMU? Charge?
Found in electron cloud. AMU- nothing. Charge: negative
200
What scientist proposed an Atomic Theory which states that all atoms are small, hard, indivisible and indestructible particles made of a single material formed into different shapes and sizes. (440 B.C)
Democritus
200
What scientist did not support Democritus's theory, and also made a theory that explained matter was made of four elements: earth, fire, water, air. Theory persisted for 2000 years (350 B.C) Also was a Greek philosopher.
Aristotle.
200
What scientist was the father of atomic theory, all matter is composed of extremely small particles called atoms, all atoms of a given element are identical having the same: size, mass, and chemical properties. All atoms of different elements are different, atoms cannot be created, divided into smaller particles or destroyed. Atoms combine. (1803) Model: a tiny solid ball that could not be broken into parts.
John Dalton
300
1856-1940 Model was cathode rays to prove Daltons solid ball could be broken into parts. Given credit for discovering electrons, model was called the plum-pudding model.
JJ Thomson.
300
Which scientist had the gold foil experiment where the some of the "bullets" bounced off the gold foil instead of going right through as expected. (1897) Credited for discovering protons, Positive charged particles were contained in the nucleus.
Rutherford
300
1913. Each electron in a specific energy level (orbit).
Bohr
300
What is the mass number
sum of protons and neutrons
400
What force pulls objects together?
Gravity
400
What force makes objects with opposite charges attract to each other?
Electromagnetic force.
400
What force makes protons push away from each other?
Strong force
400
What force allows a neutron change into a proton?
Weak force