Answer:
D. The electron moved up to an energy level and has an energy of 21.72 x 10−19 J.
The correct option is D.
Engineers and constructions workers have different types of footwear, which they make use of when they are in the field. Each of these foot wears has its own purpose and functions. For instance, the steel toe boots serve to protect the foot from falling falling objects and also from compression. The foot wear has a protective support in the toe and also possesses a mid sole plate to protect the foot again puncture from the sole.
1.) heating up the alloy to a temperature that all solute atoms are dissolved to form a single-phase solid solution
2.)Quenching is used to produce a nonequilibrium supersaturated solid solution.
A- The type of bread. some breads can become moldy faster than others.
Barium :
with +2 being the charge
Oxygen :
with -2 being the charge
The given equation can be written as:
Ba + O = BaO
Since the sum charges of Barium and Oxygen equals 0, there is no need to add subscripts.
Both Ba and O appear on the left and right side of the equation once, so there is no need to add a coefficient.
Ba + O = BaO is balanced