Beryllium's atomic mass is 9,and its atomic number is 4.How many neutrons are found in a beryllium atom?
A) 9
B) 13
C) 4
D) 5
Correct Answer:
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Q1: An atom with an electrical charge is
Q3: An uncharged atom of gold has an
Q4: All atoms of an element have the
Q5: The four most common elements found in
Q6: In the following reaction,what type of bond
Q6: Sulfur has an atomic number of 16.
Q10: Which of the following elements,essential to life,is
Q11: _ is an example of an element.
A)Water
B)Carbon
C)Glucose
D)Salt
Q14: How do radioactive isotopes differ from isotopes?
A)Radioactive
Q18: How can radiation be controlled and safely
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