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What do scientists do when experiments show their hypotheses to be incorrect?
Hopefully the publish their negative results.
Who observed streams of negative charged particles?
Streams of negatively charged particles, known as electrons, were first observed by British physicist J.J. Thomson in 1897. His experiments with cathode rays demonstrated that these particles were much smaller than atoms and had a negative charge. This discovery was pivotal in the development of atomic theory and led to the understanding of the structure of atoms.
How j.j Thomson discovered electrons are negative?
J.J. Thomson discovered electrons are negative by conducting experiments with cathode rays in vacuum tubes. He observed how the rays were attracted to a positively charged plate, leading him to conclude that the particles in the rays carried a negative charge, which he named electrons.
What was a testable idea that J.J. Thomson developed through his experiments?
J.J. Thomson developed the testable idea that atoms contain negatively charged particles, which he called "corpuscles," now known as electrons. Through his experiments with cathode rays, he demonstrated that these particles were much smaller than atoms and had a negative charge. This led to the proposal of the "plum pudding" model of the atom, where electrons were embedded within a positively charged "soup." His work laid the foundation for the understanding of atomic structure and the existence of subatomic particles.
Do detergents affect the plant growth in experiments?
Yes, detergents can affect plant growth in experiments. Detergents can disrupt the cell membranes of plants, leading to decreased growth and nutrient uptake. It is important to be cautious when using detergents in plant experiments to avoid negative effects on plant health.
What evidence supported thomsons hypothesis that the negative particles he observed from inside atoms?
Thomson had two pieces of evidence: 1- No matter what metal he used for the disk, the particles produced were indentical. 2- The particles had about 1/2000 the mass of a hydrogen, the lightest atom. These experiments provided the first evidence that atoms are made of even smaller particles.
What evidence supported Thomson's hypothesis that negative particles he observed came from inside atoms.?
Thomson had two pieces of evidence: 1- No matter what metal he used for the disk, the particles produced were indentical. 2- The particles had about 1/2000 the mass of a hydrogen, the lightest atom. These experiments provided the first evidence that atoms are made of even smaller particles.
Who invented positive and negative charges?
Benjamin Franklin is credited with proposing the concept of positive and negative charges in the 18th century while conducting experiments with electricity.
Who identified electrons to have a negative charge?
J.J. Thomson is credited with identifying electrons to have a negative charge through his experiments with cathode rays in the late 19th century.
Do anodes have a positive electricity charge?
The "anode" is usually considered to be "negative". However in some experiments such as Gel Electrophoresis the anode is positive.
Who discovered negative charge?
The concept of negative charge was first introduced by Benjamin Franklin in the 18th century. Franklin's experiments with electric charges led him to propose the existence of two types of charges: positive and negative.
Who isolated the electron first?
The electron was identified and assigned the negative charge in 1897 by J.J. Thomson and his team of British physicists. They performed experiments indicating that cathode rays really were unique particles, rather than waves, atoms or molecules as was believed earlier.
