A.16
B.18
C.20
D.22
Related Mcqs:
- The atomic weight of elements are usually fractional because
- A radioactive element A on radioactive disintegration gives two elements B and C. If B is helium and C is the element of atomic number 90 and atomic weight 234.1 the element A is
- The mass number of an element is 40 and atomic number 20. The ratio of neutrons to protons is
- The atomic heat capacities of all solid elements
- What is the atomic or ionic characteristic that determines the elements of which the atom or iron is representative?
- An atom can be considered as having a dense nucleus of neutrons and protons and a surrounding distribution of electrons. If there are x neutrons y protons and z electrons what sort of relationship exists between x y and z in a small neutral atom? Where ? means approximately equals.
- Out of 92 naturally occurring chemical elements how many are considered as bio-elements??
- Thermal neutrons are those which
- For reversible isobaric process the exponent n in the relation PVn = constant has the value of where ? = ratio of specific heats
- The number of neutrons in the nucleus of tritium is
