To calculate the velocity on an object, the of the position vs time graph should be calculated

Slope of graph

Explanation:

The total displacement divided by total time taken by an object is called its velocity. When a position - time (x-t) graph is plotted, the magnitude of velocity is given by its slope.

The slope of position-time graph gives the velocity of an object. The attached figure shows a position time graph.

The slope of this graph is given by :

i.e.

The velocity of this object is 10 m/s. So, to calculate the velocity on an object, the slope of the position vs time graph should be calculated.                              

the answer is c. it will give up it's valence electron to the other atom.