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A. Number of Electrons
B. Number of Protons
C. Atomic Number of Element
D. Number of Isotopes

A. 39
B. 19
C. 20
D. 29

A. Radical
B. Mixture
C. Compund
D. Substance

A. 2,8,9
B. 2,8,8,1
C. 2,8,1
D. 2,8,3

A. Ibne Sina
B. Al Razi
C. Al Beruni
D. Jaber Bin Hayan

A. H2
B. NH3
C. H2O
D. CO2

A. H2O2
B. HO
C. OH2
D. O2H2

A. 98 a.m.u
B. 9.8gm
C. 98gm
D. 9.8 a.m.u

A. Mono atomic Molecule
B. Poly atomic Molecule
C. Hetero atomic Molecule
D. Di atomic Molecule

A. Chemical Formula
B. Empirical Formula
C. Molecular Formula
D. Formula Mass