Who was the first to propose the existence of atoms

Asked by admin @ 27/09/2021 in Chemistry viewed by 253 People

Who was the first to propose the existence of atoms? John Dalton Democritus Joseph Proust Ernest Rutherford

Answered by admin @ 27/09/2021

Answer is: Democritus.

Democritus (c.460 — c.370 BC) was an Ancient Greek philosopher.

According to his atomic theory:

1) everything is composed of atoms.

2) atoms are physically indivisible

3) there is empty space between atoms.

4) atoms are indestructible and in motion.

5) there is an infinite number of atoms, which differ in shape and size.

Who was the first to propose the idea of atoms

Asked by admin @ 05/11/2021 in Chemistry viewed by 257 persons

Who was the first to propose the existence of atoms? John Dalton Democritus Joseph Proust Ernest Rutherford

Inert gases exist in the form of free atoms

Asked by admin @ 20/08/2021 in Science viewed by 460 persons

Inert gases exist in the form of Free Atoms

What two types of particles exist within an atomic nucleus

Asked by admin @ 02/08/2021 in Science viewed by 313 persons

What two types of particles exist within an atomic nucleus?

First 30 elements with atomic number and mass number

Asked by admin @ 23/08/2021 in Chemistry viewed by 337 persons

1 to 30 elements with atomic number and round off atomic mass

Velocity of electron in first orbit of hydrogen atom

Asked by admin @ 20/08/2021 in Chemistry viewed by 325 persons

Q7) Calculate the velocity of electron in the first Bohr orbit of hydrogen atom. [Given:- Bohr radius = 0.529 Å, h = 6.626×10-34 Js, mass of the electron = 9.1×10-31 …

Atomic mass of first 20 elements in whole numbers

Asked by admin @ 17/08/2021 in Math viewed by 390 persons

List of first 20 elements with atomic mass,symbol,atomic number,valency

Effective atomic number for the first transition series is

Asked by admin @ 13/08/2021 in Chemistry viewed by 330 persons

(3) Effective atomic number for first transition series is(a) 36(b) 54(C) 86(d) 18

Atomic number and mass number of first 20 elements

Asked by admin @ 13/08/2021 in Math viewed by 334 persons

List of first 20 elements with atomic mass,symbol,atomic number,valency

Who provided evidence for the existence of an atomic nucleus

Asked by maham237 @ 10/07/2021 in Chemistry viewed by 284 persons

J. J. Thomson John Dalton Ernest Rutherford

Atomic mass and atomic number of first 20 elements

Asked by admin @ 17/08/2021 in Math viewed by 519 persons

List of first 20 elements with atomic mass,symbol,atomic number,valency

In hydrogen atom energy of first excited state is

Asked by admin @ 17/08/2021 in Chemistry viewed by 330 persons

In hydrogen atom, energy of first excited state is -3.4eV. Then find out KE of same orbit of hydrogen atom

Easy way to learn atomic mass of first 20 elements

Asked by admin @ 03/08/2021 in Chemistry viewed by 322 persons

Trick to remember the atomic masses of first twenty elements of periodic table.

Composition of atoms of the first 20 elements with valency

Asked by admin @ 03/08/2021 in Physics viewed by 307 persons

Valency and valence electrons of first 20 elements

Who provided the first evidence that atoms contain subatomic particles

Asked by maham237 @ 23/05/2021 in Chemistry viewed by 299 persons

Ernest Rutherford J. J. Thomson John Dalton

The first chairman of the atomic energy commission was name

Asked by admin @ 07/08/2021 in Social Sciences viewed by 271 persons

_____________was named as the first chairman of the atomic energy commission.(a) Dr Homi Bhabha. (b) Dr Homi sethna. (c) Dr A. P. J. Abdul Kalam. (d) Dr raja ramanna.