Points to remember
* An atom is the smallest particle
of a chemical element that retains its chemical properties.
* They are very tiny compared to
other particles.
* Atoms are too small to be seen by the naked eye
or even through microscope.
* An atom consists mostly of empty
space.
* Atoms of same element are
identical, and different elements differ.
* An atom consists of a dense
nucleus of positively-charged protons and electrically-neutral neutrons.
* The protons and neutrons are
called nucleons.
* The protons, neutrons and
electrons are denoted by p,n,e respectively.
* An atom is electrically neutral.
Atoms contain equal number of protons and electrons.
* Atomic number is the number of
protons in an atom.
* The total number of protons and
neutrons present in the nucleus of an atom is the mass number.
* Valency is defined as the
combining capacity of an element.
ICT CORNER
Atomic Structure
Let’s
build an atom.
PROCEDURE :
Step
1: Use the URL to reach stimulation page. Click play button to launch the
simulation.
Step
2: Click on the”ATOM” , a new window will be open. Drag the particles (Protons,
Neutrons and Electrons) from the baskets which is at the bottom of the display.
Step
3: You can observe the changes in ‘Elements, Net charge and Mass number’ at the
right side windows.
Step
4: Click on the ‘Symbol” at the bottom. Drag the particles and get the Symbol
of the element.
Step 5: Click on the”GAME” and play the games.
Atomic Structure URL:
https://phet.colorado.edu/en/simulation/build-an-atom
*Pictures are indicative only
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