Structure of the Atom
Everything that exists in our universe is made up of this tiny particle called atom. The computer you are working on is made up of atom..
Size of the Atom Elements
Atoms are infinitesimally small. Smaller than any thing we can imagine. One hydrogen atom, the smallest atom known, is approximately 5 x 10 -8 mm in diameter. To put that in perspective, it would take almost 20 million hydrogen atoms to make a line as long as this dash ' - '. The extremely small si..
Question 13
Question: Which of the following is an incorrect formula? 1. NaCl 2 2. BaSO 4 3. H 2 CO 3 4. P 2 O 5 Answer: ..
Electricity Introduction
. But it was the American inventor, Benjamin Franklin (1706 - 1796) who experimented with electricity and made major inroads in understanding the phenomenon. By the middle of the eighteenth century, there were machines that could generate large electrical charges. Static electricity may produce dra..
. But it was the American inventor, Benjamin Franklin (1706 - 1796) who experimented with electricity and made major inroads in understanding the phenomenon. By the middle of the eighteenth century, there were machines that could generate large electrical charges. Static electricity may produce dra..Motion - Test Questions
Question 1 - Question: (i) Define the following terms: (a)speed (b) velocity (c) uniform velocity (d) non uniform velocity (e) acceleration (f) retardation. (ii) Distinguish between: (a) Speed and Velocity (b) Uniform acceleration and Variable acceleration Answer: (a) Speed Speed is the distan..
The Modern Periodic Table
>The modern periodic table is also known as the long form of the periodic table or the extended form of the periodic table. In this table, the elements are arranged in the order of increasing atomic numbers in such away that elements with similar properties fall in the same vertical column. These v..
Occurrence of Metals
Minerals and Ores - Metals and their compounds are found in earth as natural elements known as minerals. Ores are minerals from which metals are extracted profitably and conveniently. Ores contain metal compounds with a lower percentage of impurities. All the ores are minerals, but all minerals are..
Structure of Atom
When scientists started exploring matter, they discovered that the smallest particle of an element that maintains its chemical identity through all chemical and physical changes is called and 'atom'. Just how small these atoms are can be made out if you realize that there are about 60,000,000,000,..
When scientists started exploring matter, they discovered that the smallest particle of an element that maintains its chemical identity through all chemical and physical changes is called and 'atom'. Just how small these atoms are can be made out if you realize that there are about 60,000,000,000,..Mendeleev's Periodic Table
Period Group I Group II Group III Group IV Group V Group VI Group VII Group VIII 1 H=1 - - - - - - - 2 Li=7 Be=9 B=11 C=12 N=14 O=16 F=19 - 3 Na= 23 Mg= 24 Al= 27.3 Si=28 P=31 S=32 Cl=35.5 4 First series K=39 Ca=40 Sc=45 ..
Period Group I Group II Group III Group IV Group V Group VI Group VII Group VIII 1 H=1 - - - - - - - 2 Li=7 Be=9 B=11 C=12 N=14 O=16 F=19 - 3 Na= 23 Mg= 24 Al= 27.3 Si=28 P=31 S=32 Cl=35.5 4 First series K=39 Ca=40 Sc=45 ..The Computer Science Department had 24 students in the year 2002. If 1..
The Computer Science Department had 24 students in the year 2002. If 10 of these students failed, then how many students graduated? => 18 or 10 or 14 or 34..
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