Multiple Choice
An atom with Z = 31 and A = 69 contains ________ protons and ________ neutrons.
A) 31;69
B) 69;31
C) 31;38
D) 38;31
E) 31;100
Correct Answer:
Verified
Correct Answer:
Verified
Q1: An element with 2 valence electrons is<br>A)Se.<br>B)Si.<br>C)Ca.<br>D)Rb.<br>E)C.
Q2: How many electrons are there in the
Q3: Which chemical symbol represents a metalloid?<br>A)Al<br>B)B<br>C)Ga<br>D)Zn<br>E)Ar
Q4: Element Z has the following properties:<br>A.noncombustible<br>B.unreactive<br>C.colorless,odorless gas
Q5: Which chemical symbol represents a metallic element?<br>A)Ar<br>B)Br<br>C)Ca<br>D)H<br>E)P
Q7: Element Z has the following properties:<br>A.silvery-white solid
Q8: Transition metals can also be called<br>A)s-block elements.<br>B)p-block
Q9: In a neutral atom the number of
Q10: For the isotope <sup>71</sup>Ga,Z = _ and
Q11: Explain the term "quantized" as it applies