How many protons are there in an atom of ?
A) 12
B) 34
C) 23
D) 11
Correct Answer:
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Q1: The mass number (A) of a nuclide
Q2: Who discovered the electron in 1897?
A) Ernest
Q7: The diameter of an average nucleus is
Q11: The various isotopes of an element all
Q12: The atomic number (Z) of an element
Q17: Who discovered the atomic nucleus in 1911?
A)
Q21: When undergoes alpha decay,the daughter is
Q23: When an unstable Cd nucleus undergoes gamma
Q39: Which type of atom is the standard
Q40: Which isotope of hydrogen is radioactive?
A) Protium
B)
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