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A. 1.568 × 10³
B. 6.023 × 10¹⁹
C. 4.84 × 10¹⁷
D. 6.023 × 10²³

A. Always less than its atomic number
B. The sum of the number of protons and neutrons present in the nucleus
C. Always more than the atomic weight
D. A fraction

A. Adding sodium carbonate
B. Distillation
C. Adding caustic soda
D. Boiling

A. Lanthanides
B. Actinides
C. Halogens
D. Nobel gases

A. Ionization energy
B. Atomic radius
C. Electronegativity
D. Electron affinity

A. Short period
B. Long period
C. Normal leriod
D. Very long period

A. Atomic radius
B. Electronic configuration
C. Ionization Energy
D. Electron affinity

A. Solid
B. Gas
C. Liquid
D. None of these

A. CO2
B. Water
C. Sugar
D. Pyruvic acid

A. An instrument to measure blood pressure
B. A gene
C. A chemical used in the manufacture of fertilizers
D. An explosive