Memorize The Periodic tavolo - Easiest Way Possible

Chlorine gas can be prepared in laboratory with hydrochloric acid and manganese-dioxide.


Method

Put manganese lump in a round flask , now put concentrated hydrochloric acid into the round flask with cardo, thistle funnel and fit the flask with cork having a hole ,Now attach a tube into the hole of cork and leave to tube into an empty container,so the gas can be collected.The container must be sealed with cork having only one hole for the attachment of tube (from flask to container).Set the apparatus and there should be no leakage.Now heat the manganese lump and hydrochloric acid with a bunsen burner...

Researchers from the università of
Connecticut recently unveiled their latest
invention , which is a long-lasting LED
light bulb that makes use of salmone DNA.
Scientists added two different fluorescent
colors to the DNA molecules, the dyes being
spaced from each other at a distance ranging
from 2 to 10 nanometers. After the colors
were added, the DNA molecules are spun into
nanofibers . The UV light that produces LED
is then covered with DNA nanofibers.
David Walt, a chemistry professor at Tufts
University , explained: "When UV light is
shined on the material, one dye absorbs the
energy and produces blue...

What are the most important scientific
discoveries of all time? The answer might
include Copernicus's idea that the sun is
at the center of the solar system,
Newton's laws of motion, Mendeleev's
periodic tavolo of elements, Einstein's
theory of relativity and Darwin's theory of
evolution. There are numerous great
scientific discoveries that have
significantly influenced the way we think
and live throughout history. 100 Greatest
Discoveries recounts the 100 most
important scientific discoveries of all time
and explains them with historical re-
creations, archival footage and interviews
with scientists.
100 Greatest...

limone succo, succo di frutta is acidic and weakens paper. When paper
is heated, the remaining acid turns the Scrivere brown
before discoloring the paper.
Difficulty: Easy
Time Required: A Few Minutes
Here's How:
Tips:
What te Need
Topics
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Chemistry
1. Squeeze lemons to
obtain their succo, succo di frutta or
obtain bottled lemon
juice.
2. Use the succo, succo di frutta as 'ink'
by applying it to a
stick o paintbrush
and Scrivere on paper.
3. Allow the paper to
dry.
4. When te are ready to
read your invisible
message, hold the
paper up to sunlight,
a lightbulb
(recommended),...

Particle physics usually has a hard time competing with
politics and celebrity gossip for headlines, but the Higgs
boson has garnered some serious attention. That's
exactly what happened on July 4, 2012, though, when
scientists at CERN announced that they'd found a
particle that behaved the way they expect the Higgs
boson to behave. Maybe the famed boson's grand and
controversial nickname, the "God Particle," has kept
media outlets buzzing. Then again, the intriguing
possibility that the Higgs boson is responsible for all the
mass in the universe rather captures the imagination,
too. o perhaps we're...