Which Statement About Our Current Knowledge of Elements Is FALSE

question 72

Multiple Choice

Which statement about our current knowledge of elements is FALSE?

• A)We now know of more than 110 elements, both natural and artificial.
• B)81 stable elements have been found on Earth.
• C)10 radioactive elements are also found on Earth.
• D)We have now produced over 50 radioactive elements not occurring in nature.
• E)Technetium is found in giant stars, but not yet in nature on the Earth.

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Definitions:

Adrenal Medulla

The inner part of the adrenal gland that produces adrenaline and noradrenaline, hormones involved in stress response.

Epinephrine

A hormone and neurotransmitter also known as adrenaline, involved in the body's fight-or-flight response.

Norepinephrine

A neurotransmitter involved in regulating stress responses, attention, and arousal in the brain and body.

Depersonalization Disorder

A dissociative disorder characterized by persistent or recurrent experiences of feeling detached from one's own body or mental processes.