Chemistry – Atoms -Important Properties-Important One Liners

Please follow and like us:
Pin Share


Atoms -Important Properties-Important One Liners


1-An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.

2-Every atom is composed of a nucleus and one or more electrons bound to the nucleus.

3-Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms.

4-The nucleus is made of one or more protons and typically a similar number of neutrons.

5-Atoms are very small; typical sizes are around 100 picometers (a ten-billionth of a meter, in the short scale)

6-Protons and neutrons are called nucleons.


8-Atoms can attach to one or more other atoms by chemical bonds to form chemical compounds such as molecules.

9- The number of neutrons defines the isotope of the element. The number of electrons influences the magnetic properties of an atom.


11-In 1827, botanist Robert Brown used a microscope to look at dust grains floating in water and discovered that they moved about erratically, a phenomenon that became known as “Brownian motion”.

12-French physicist Jean Perrin used Einstein’s work to experimentally determine the mass and dimensions of atoms, thereby conclusively verifying Dalton’s atomic theory.




16- In 1944, Hahn received the Nobel prize in chemistry.

17-The neutron was discovered in 1932 by the English physicist James Chadwick.

18-The proton, the electron, and the neutron are classified as fermions.



21-The Earth contains approximately 1.33×1050 atoms.

(Visited 102 times, 1 visits today)
Please follow and like us:
Pin Share

Leave a Reply


%d bloggers like this: