Multiple Choice
How many electrons are present in 40Ca2+?
A) 40
B) 38
C) 20
D) 18
Correct Answer:

Verified
Correct Answer:
Verified
Q7: In the modern periodic table, the densest
Q8: The molecular formula for calcium phosphate is
Q9: The systematic name of V<sub>2</sub>O<sub>5</sub>is vanadium pentoxide.
Q10: The vertical columns in the periodic table
Q11: Which of the following is a metalloid?<br>A)Boron<br>B)Lithium<br>C)Uranium<br>D)Tungsten
Q13: Potassium has two stable isotopes: <sup> 39
Q14: _ are examples of actinides.<br>A)Ti and Cr<br>B)U
Q15: Elements in a periodic family tend to
Q16: The molecular formula for iron(II)bromide is _.<br>A)FeBr<sub>3</sub><br>B)FeBr<sub>2</sub><br>C)I<sub>2</sub>Br<sub>2</sub><br>D)IBr<sub>3</sub>
Q22: Uranium, plutonium, and neptunium are classified as:<br>A)