Astronauts experience weightlessness which is the apparent loss of weight of an object that is falling in gravitational field
Try out answer C magnesium oxides melting point is almost 5 times higher than magnesium
D. They act on a specific type of substrate in a reaction
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Answer:
C
Explanation:
Calcium is an element with a total of 20 electrons.
It has 4 shells with a configuration of:
2, 8, 8, 2
Option C is the most similar to calcium but the number of shells is not complete.
It still requires two more shells with 8 and two electrons respectively.
