A. different number of protons
B. same number of neutrons
C. different number of neutrons
D. same mass number (nucleon number)
A. sand
B. haemoglobin
C. diamond
D. maltose
A. Mass of an atom itself is in fraction
B. Atomic masses are average masses of isobars
C. Atmoic masses are average masses of isotopes proportional to their relative abundance
D. Atmoic masses are average masses of isotopes
A. 80%
B. 30%
C. 40%
D. 20%
A. 154
B. 280
C. 86
D. 300
A. 0.25
B. 0.5
C. 0.75
D. 1
A. 2.24 dm3
B. 22.4 dm3
C. 1.12 dm3
D. 112 dm3
A. oxygen
B. carbon
C. tin
D. chlorine
A. 0.18 mole
B. 0.27 mole
C. 0.24 mole
D. 0.09 mole
A. formula unit
B. empirical formula
C. molecular formula
D. formula mass