The edge length of a a unit cell of calcium crystal is 509.12 pm.
Calcium crystal has a face center cubic (FCC) structure.
The edge length of the unit cell for face center cubic (FCC) structure is given in the following formula;
a = 2r√2
where;
a = 2 x 180 x √2
a = 509.12 pm
Thus, the edge length of a a unit cell of calcium crystal is 509.12 pm.
Learn more about edge length here: brainly.com/question/11796119
Answer:
1 . Nonmetal
2. metal, non metal
3. Ion
4. positive
a. True
b. False
Answer: False (b)
Explanation: No two elements can have the same spectrum.