Famous scientists chem
問題一覧
1
How many times can you break something in half, Coined term atom
2
Democritus
3
Democritus
4
Each element is made up of tiny indivisible particles called atoms., The atoms of each given element are identical., Chemical compounds form when atoms combine with each other. These compounds are formed in whole number ratios., Chemical reactions involve reorganization of the atoms. Atoms are not created or destroyed during a reaction., Compounds have unchanging formulas., A given compound always contains the same properties of elements by mass., When 2 elements form a series of compounds, the ratios of the masses of the second element that combine with 1g of the first element cab always be reduced to small whole numbers., Sometimes 2 elements come together in more than one way, forming compounds with similar, though not identical formulas.
5
English school teacher
6
John Dalton
7
John Dalton
8
John Dalton
9
Discovered the electron and proposed a model for the structure of the atom.., Knew electrons had a negative charge and thought that matter must have a positive charge. His model looked like raisins stuck on the surface of a lump of pudding.
10
J.J. Thomson
11
J.J. Thomson
12
Enlish physicist
13
Max Planck
14
German physicist
15
Albert Einstein
16
Electrons are released
17
Ernest Rutherford
18
Ernest Rutherford
19
Helium atom without electrons
20
Gold foil experiment, Discovered that atoms consist of a compact, positively charged nucleus, around which negative electrons circulate at a relatively large distance., The nucleus occupies less than one-thousand-million millionths of the atomic volume, but contains almost all of the mass.
21
Niels Bohr
22
Electrons can orbit only at a certain allowed distance from the nucleus., Atoms radiate energy when an electron jumps from a higher-energy orbit to a lower-energy orbit. Also, an atom absorbs energy when an electron gets boosted from a low-energy orbit to a high energy orbit., The electron can existb in only one of the orbits., Llight, photons, emit whenever an electron jumps from one orbit to another. The jumps seem to happen instantaneously without moving through a trajectory.
23
James Chadwick
24
Discovered the neutron, Neutrons measured slightly heavier than the proton with no charge.
25
English physicist
26
Danish physicist
27
Law of definite proportion, Law of multiple proportions
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72問 • 2年前問題一覧
1
How many times can you break something in half, Coined term atom
2
Democritus
3
Democritus
4
Each element is made up of tiny indivisible particles called atoms., The atoms of each given element are identical., Chemical compounds form when atoms combine with each other. These compounds are formed in whole number ratios., Chemical reactions involve reorganization of the atoms. Atoms are not created or destroyed during a reaction., Compounds have unchanging formulas., A given compound always contains the same properties of elements by mass., When 2 elements form a series of compounds, the ratios of the masses of the second element that combine with 1g of the first element cab always be reduced to small whole numbers., Sometimes 2 elements come together in more than one way, forming compounds with similar, though not identical formulas.
5
English school teacher
6
John Dalton
7
John Dalton
8
John Dalton
9
Discovered the electron and proposed a model for the structure of the atom.., Knew electrons had a negative charge and thought that matter must have a positive charge. His model looked like raisins stuck on the surface of a lump of pudding.
10
J.J. Thomson
11
J.J. Thomson
12
Enlish physicist
13
Max Planck
14
German physicist
15
Albert Einstein
16
Electrons are released
17
Ernest Rutherford
18
Ernest Rutherford
19
Helium atom without electrons
20
Gold foil experiment, Discovered that atoms consist of a compact, positively charged nucleus, around which negative electrons circulate at a relatively large distance., The nucleus occupies less than one-thousand-million millionths of the atomic volume, but contains almost all of the mass.
21
Niels Bohr
22
Electrons can orbit only at a certain allowed distance from the nucleus., Atoms radiate energy when an electron jumps from a higher-energy orbit to a lower-energy orbit. Also, an atom absorbs energy when an electron gets boosted from a low-energy orbit to a high energy orbit., The electron can existb in only one of the orbits., Llight, photons, emit whenever an electron jumps from one orbit to another. The jumps seem to happen instantaneously without moving through a trajectory.
23
James Chadwick
24
Discovered the neutron, Neutrons measured slightly heavier than the proton with no charge.
25
English physicist
26
Danish physicist
27
Law of definite proportion, Law of multiple proportions