+91-87964 74404
FlagBACK
Question icon
11 grade chemistry others

Who proposed the planetary model of the atom?

  • A. John Dalton (early 1800s)
  • B. Ernest Rutherford (1911)
  • C. Niels Bohr (1913)
  • D. Joseph John Thomas (1897)

Profile image of Aniket Singh
11 Months agoGrade
Answers icon

1 Answer

Profile image of Askiitians Tutor Team
ApprovedApproved Tutor Answer11 Months ago

The planetary model of the atom was proposed by Ernest Rutherford in 1911. This model depicted the atom as having a small, dense nucleus surrounded by orbiting electrons, similar to planets orbiting the sun.

Key Contributors to Atomic Theory

  • John Dalton - Developed the first modern atomic theory in the early 1800s.
  • Joseph John Thomson - Discovered the electron in 1897 and proposed the "plum pudding" model.
  • Niels Bohr - Improved upon Rutherford's model in 1913 by introducing quantized electron orbits.

Each of these scientists played a crucial role in shaping our understanding of atomic structure.

Other Related Questions on 11 grade chemistry others

question mark

Which of the following is likely to be least stable?

  • (A) Ca₄₀
  • (B) Mn₅₅
  • (C) Sn₁₁₉
  • (D) Al₃₀
Grade 1111 grade chemistry others
1 Answer Available

Last Activity: 10 Months ago

question mark

Which of the following is not a Lewis acid?

  • A. BF₃
  • B. AlCl₃
  • C. FeCl₃
  • D. PH₃
Grade 1111 grade chemistry others
1 Answer Available

Last Activity: 10 Months ago

question mark

Which of the following is not a property of compounds?

  • (A) They are made up of two or more kinds of atoms.
  • (B) They cannot be broken down into two or more simpler substances by physical means but by chemical means only.
  • (C) Properties of compounds differ from those of their elements.
  • (D) None of the above.
Grade 1111 grade chemistry others
1 Answer Available

Last Activity: 10 Months ago

question mark

Which of the following is polar?

  • A. NF₃
  • B. BF₃
  • C. SF₄
  • D. SiF₄
Grade 1111 grade chemistry others
1 Answer Available

Last Activity: 10 Months ago

question mark

Which of the following metals exists in their native state in nature?

  • (i) Ca
  • (ii) Au
  • (iii) Zn
  • (iv) Ag

A. (i) and (ii)

B. (ii) and (iii)

C. (ii) and (iv)

D. (iii) and (iv)

Grade 1111 grade chemistry others
1 Answer Available

Last Activity: 10 Months ago