2. Atoms & Elements

Which element has exactly 3 protons in its nucleus?

How many protons are present in an atom of the element cobalt (Co)?

How many protons are present in a neutral carbon atom?

Which of the following best describes the overall charge of the nucleus of an atom?

Which of the following is true of both chlorine and sodium atoms?

Where are the neutrons located in the atom?

How many protons are present in an atom of antimony (Sb)?

Which one of the following is the most abundant gas in Earth's atmosphere?

What is the mass number for an atom of xenon containing 54 protons and 76 neutrons?

How many protons are present in a neutral atom of magnesium?

Which of the following best describes the electric charge of an electron?

How many electrons are present in a neutral sodium atom?

Can a single atom be considered a molecule?

Which of the following best explains why the mass spectrum of chlorine shows two major peaks at approximately 35 and 37 atomic mass units?

How many neutrons are present in a neutral atom of bromine (Br) with a mass number of 80?