10 Questions
According to Thomson's 'plum pudding' theory, atoms were postulated to be?
Solid structures of positive charge with tiny negative particles stuck inside
Who discovered positively charged particles called protons?
Goldstein
Who found the negatively charged particles known as electrons?
J.J. Thomson
According to Dalton's atomic theory, atoms of the same element are?
Alike
Which scientist proposed that atoms were indivisible, hard, dense spheres?
Dalton
Who discovered the positively charged particles called protons?
Goldstein
According to Dalton's atomic theory, what did he consider an atom to be?
An indivisible, hard, dense sphere
Based on Thomson's observations, what did he postulate about the structure of atoms?
Atoms were solid structures of positively charge with tiny negative particles stuck inside
Who found the negatively charged particles known as electrons in an atom?
J.J. Thomson
What did scientists discover about electrons and protons based on their experiments?
They are fundamental particles of matter
Study Notes
Atomic Theories
- Atoms were postulated to be composed of a positively charged sphere with negatively charged particles embedded in it, according to Thomson's 'plum pudding' theory.
Protons and Electrons
- Positively charged particles called protons were discovered by Rutherford.
- Negatively charged particles known as electrons were found by J.J. Thomson.
Dalton's Atomic Theory
- Atoms of the same element are identical in mass, shape, and size, according to Dalton's atomic theory.
- Dalton proposed that atoms were indivisible, hard, dense spheres.
Atomic Structure
- Based on Thomson's observations, he postulated that atoms have a positively charged sphere with negatively charged particles (electrons) embedded in it.
Experiments and Discoveries
- Scientists discovered that electrons and protons are constituents of atoms, based on their experiments.
Test your knowledge of atomic structure theories and experiments in this quiz. Explore Dalton's atomic theory, subatomic particles, and key experiments that led to our understanding of the atom's structure.
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