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Nuclei contain uncharged neutrons and positively charged protons; these two particles with about the same mass are known as nucleons. The number of protons is the atomic number of an element (Z), and is matched in a neutral atom by the exact number of electrons. The total number of nucleons is the mass number and is specified by a superscript on the symbol of the element. Thus 1H has a nucleus with no neutrons and one proton, 16O has eight protons and eight neutrons, 208Pb has 82 protons and 126 neutrons.
first two groups are metal but why hydrogen is placed in first group
The maximum number of electrons that can be accommodated in a 3d subshell is: (1) 2 (2) 10 (3) 6 (4) 14 Ans: 10
F of NH4Cl->NH3 +HCl when p(NH3)not =p(HCl) F of KClO3->KCl +O2 KClO3=solid &KCl=solid & other are in gas. PLEASE REPLY TODAY(NEED TO COMPLETE THE ASSIGNMENT)
Which of the following sets of quantum numbers is correct for an electron in 4f orbital: (1) n-=4, l=3. m+1, s= +1/2 (2) n-=4, l=4. m-4, s= -1/2
Types of addition reactions Addition reactions can be categorized into three categories on the basis of the nature of initiating species. (A) Electrophilic additions (B)
Glucose, (C 6 H 12 O 6 ) or Aldo-hexose Glucose is termed as dextrose as it happens in nature as the optically active dextrorotatory isomer. It is as well known as grape sugar
How ion works?
Borax bead test : The transparent glassy bead while heated along with inorganic salt and the colour produced gives some idea of cation present in it. Table:
what size is an atom
Draw the structure of anisole and phenetole
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