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anomalous behaviour of beryllium
The only nonradioactive isotope of fluorine has 9 protons and 10 neutrons. a. What is its mass number. b. Write the full symbol of this atom.
what are the chemical properties of colloids
The electronic configuration of four elements are given in brackets: L (1s 2 , 2s 2 , 2p 1 , ) M (1s 1 , 2s 2 , 2p 5 ) Q (1s 2, 2s 2 , 2p 6 3s 1 ,) R ( 1s 1 , 2s 2 , 2p
A hydrogen-filled balloon was ignited and 2.00 of hydrogen reacted with 16.0 of oxygen.
why we take carbon 12 as standard?
to study the presence of aroma,taste, ph value and tannic acid of different tea leaves
Every substance poses exact amount of energy known as internal energy or intrinsic energy (E).
3 kinds of isomerism indienes alkynes
Existence of positively charged nucleus was established by: (1) Positive ray analysis (2) α -ray scattering experiments () X-ray analysis (4) Discharge tube exper
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