When atoms of different elements combine they form _____.
People are constantly exposed to what is termed background r…
People are constantly exposed to what is termed background radiation in the environment.
When atoms react chemically they gain, lose, or share _____.
When atoms react chemically they gain, lose, or share _____.
The nucleus of an atom always has a _____ charge.
The nucleus of an atom always has a _____ charge.
Why is iodine-131 used to assess thyroid function?
Why is iodine-131 used to assess thyroid function?
_____ formulas display the relative positions of each atom w…
_____ formulas display the relative positions of each atom within a molecule.
The _____ is the smallest particle of an element, which has…
The _____ is the smallest particle of an element, which has the properties of the element.
All nucleic acids must contain which of the following?
All nucleic acids must contain which of the following?
A solution with a pH of 7.35 is considered to be _____.
A solution with a pH of 7.35 is considered to be _____.
The symbol Na+ is used to describe a sodium _____.
The symbol Na+ is used to describe a sodium _____.