A substance that is impenetrable by x-rays is described as being radiopaque.
Radiopaque substances will not allow x-rays and or other forms of radiations to pass through them.
Instead, they absorb or block the rays and when used in radiology, they appear white or light gray on photographic films.
Radiopaque materials are applied in generating ultrasound images and other forms of clinical procedures.
More on radiopaque materials can be found here: brainly.com/question/10583205?referrer=searchResults
The answer is predict, because it fits, and because someone can predict the outcome of something.
The Mitocondria is the powerhouse of the cells in plants
In the first shell there is 2 electrons and on the second shell there is 4 elections.