What is the mass number of the most abundant form of oxygen atom?
A) 15.9994
B) 8
C) 16
D) 24
E) 32
Correct Answer:
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Q20: J.J.Thomson suggested the "plum pudding" model of
Q21: An element has 5 stable isotopes.The mass
Q22: 31.0 grams of the element phosphorus contain:
A)6.02
Q23: What is the mass in grams of
Q24: Beta particles:
A)have a mass of 4 and
Q26: Which statement below is true?
A)Metals gain electrons
Q27: An element has 5 stable isotopes.The mass
Q28: Which of the following is a metalloid?
A)mercury
B)selenium
C)bismuth
D)radium
E)calcium
Q29: Which of the following statements is true
Q30: The atomic mass interval for carbon is
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