Which statement about subatomic particles is true?

Which of the following is unique for any given element?

The number of protons in one atom of an element is that element’s

To find the number of neutrons in an atom, you would subtract

Suppose an atom has a mass number of 23. Which statement is true beyond any doubt?

Which statement is true about oxygen-17 and oxygen-18?

What can you assume has happened if an electron moves to a higher energy level?

What does the electron cloud model describe?

A horizontal row on the periodic table is called

The mass number of an element is

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