What is true about the mass of protons and neutrons?

A) They are exactly equal to each other.

B) They are exactly equal to 1 amu.

C) They have negligible mass.

D) They have masses slightly greater than 1 amu.

A nitrogen atom and an oxygen atom combine chemically to form nitric oxide. what is nitric oxide?

Which description applies to all of an element

What can affect the properties of a substance? a. the arrangment and types of atoms b. only the arrange ments of atoms c. only the types of atoms d. none of the above

The structural formula for a water molecule is

What's the control group and experiment group

The most common element in the atmosphere are

What Is the name of the force that holds together the sub Tomic particles of the nuclear?

Henry Moseley used X-ray experiments to determine the atomic number of elements. How did his discovery contribute to the development of the periodic table? A. It confirmed that elements should be arranged in strict order of increasing atomic mass. B.

Does pollution stay in the city where it originates

Cao (s) + h2o (l) = ca (oh) 2 (s) what mass of slaked lime can be produced from a mixture of 28.4 g of cao and 13.3g of h20