What is the atomic number of an atom that contains 40 protons,40 electrons,and 51neutrons?
A) 11
B) 40
C) 51
D) 91
Correct Answer:
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Q38: The mass of a copper atom is
Q39: The number of protons in an atom
Q40: The electrical charge of a nucleus is
A)positive.
B)negative.
C)the
Q41: Which isotope has the same number of
Q42: How many electrons are in a neutral
Q44: The number of protons and neutrons in
Q45: The average mass of an atom of
Q46: A substance has 13 protons,14 neutrons,and 13
Q47: The element with atomic number 53 is
A)Iron
B)Iridium
C)Iodine
D)Indium
Q48: What is the atomic number of sodium?
A)11
B)16
C)23
D)32
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