The nucleophiles are substance which are electron rich and nucleus loving. They can be neutral or negatively charged. They donate their electron pair to form a bond in the reaction. As they are electron rich, so they must have...
Which element has the lowest atomic number? The Proton Rule: The element of an atom is determined by the number of protons in the nucleus of an atom. Interestingly, this number cannot change without the atom becoming a different element. This is the only rule for the atoms of an element....
Therefore, due to a strong pull of attraction, an element is more likely to buy or gain electrons as we move along a row. The measure of an element’s ability to pull electrons towards it is known as electronegativity. The most electro-negative element is the likeliest to steal electrons ...
Quarks make upprotons and neutrons, which, in turn, make up an atom's nucleus. Each proton and each neutron contains three quarks. A quark is a fast-moving point of energy. There are several varieties of quarks. Does infinitely small exist? If so, one day, perhaps with the Hadron Colli...
A、RNA can exit the nucleus B、RNA is single stranded C、RNA is less stable than DNA D、RNA contains the nucleobase guanine(G) 点击查看答案 第8题 Pit No. 1 of the Terracotta Army has an area of more than 18,000 square meters and is the largest pit.() 此题为判断题(对,错)。
A、RNA can exit the nucleus B、RNA is single stranded C、RNA is less stable than DNA D、RNA contains the nucleobase guanine(G) 点击查看答案 第8题 Which of the following statements about trading operations in an organized exchange are correct? A、Floor traders all deal in a wide variety...
Azo dyes of the formula ##STR1## and external salts thereof, wherein F is the residue of a monoazo or disazo compound in 1:1 metal complex form or of a trisazo, disazoazoxy or tetrakisazo compound in metal-free or 1:1 metal complex form, each X is independently --NR2 --Q-...
1 SOHO, 171A Fe emission line The mass of a nucleus Energy generation in stars which nuclei are stable which nuclei exist in princi
ld be most weakened if which of the following occurred? A.Scientists created an electric field next to a vacuum, but found that the electric field was not intense enough to create a charged vacuum. B.Scientists assembled a super heavy atomic nucleus next to a vacuum, but found that no vir...
Since atoms are generally stable, this means that the model does not correctly describe the structure of the atom. What is the most accurate atomic model? The electron cloud model is currently the most sophisticated and widely accepted model of the atom. It retains the concept of the nucleus ...