2. Atoms & Elements

Which of the following determines an atom's identity?

Which gas makes up the majority of Earth's atmosphere?

Which of the following is the smallest unit of an element that still retains the chemical properties of that element?

What is the primary difference between atoms and molecules?

In a model of an atomic nucleus, what do the orange and yellow spheres typically represent?

Which one of the following statements about atomic structure is false?

Which of the following is a rule for making a neutral atom with no overall charge?

Electrons are held in an atom by attraction to which of the following?

Which statement correctly describes the number of protons in each atom of an element?

According to the Law of Conservation of Mass, where does most of a plant's biomass come from?

According to modern science, what was the approximate chemical composition of the solar nebula?

Which type of electric charge is carried by protons in an atom?

Which element is the primary constituent of most stars?

Which of the following describes a particle that contains 36 electrons?

Electrons are the negatively charged particles of atoms. Where are they located?