2. Atoms & Elements

Which element is most commonly found in the composition of minerals?

What is the mass number of an atom that contains 5 protons and 7 neutrons?

Which statement best describes how electrons are arranged in an atom?

Which of the following is the atomic number of helium?

What is the mass number for an atom of xenon containing 54 protons and 75 neutrons?

How many protons does a lithium (Li) atom have?

How many protons are present in a neutral atom of silver (Ag)?

Which of the following best describes the difference between a molecule and an atom, and provides a correct example?

Where are neutrons located in an atom?

A sample of copper has a mass of 63.5 g. How many atoms of copper are present in the sample?

How many neutrons are present in an atom of fluorine-19?

Which statement best describes an electron?

How many electrons are present in a neutral oxygen (O) atom?

Which of the following is found farthest from the center of an atom?

How many neutrons are present in the nucleus of a standard hydrogen atom?