The nucleus of atom A contains 20 protons and 20 neutrons and that of atom B contains 22 protons and 22 neutrons. It is true that atoms A and B are ________.
A) isotopes
B) isobars
C) both isotopes and isobars
D) neither isotopes nor isobars
Correct Answer:
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Q27: Which of the following statements is incorrect?
A)
Q28: The total number of subatomic particles (protons,
Q29: The number of protons, electrons and neutrons
Q30: Choose the correct chemical symbol for an
Q31: Isotopes of a given element _.
A) have
Q33: What is the mass number of a
Q34: Iron is element number 26. This means
Q35: What is the atomic number of an
Q36: Which pair of neutrons and protons correspond
Q37: Which of the following pairs of atoms
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