Multiple Choice
What is the smallest subatomic particle in terms of mass?
According to the table above, how many electrons are required to produce a charge of –2.0 C?
How many neutrons are in an atom of copper? Round your answer to the nearest whole number.
For Al, its atomic number is 13 and its mass number is 27. How many neutrons does it have?
An uncharged atom has six electrons. The nucleus of this atom must contain _______ protons.
The sum of the number of protons and neutrons in the nucleus of an atom is called the
Rounded to the nearest whole number, how many protons are in an atom of krypton? 36 48 84 120