2. Atoms & Elements

Which of the following primarily determines an atom's chemical properties?

What is the atomic number of sulfur?

How many protons are present in a neutral atom of sodium (Na)?

How many protons are present in an atom of argon?

Since atoms are mostly empty space, which of the following best explains why solid objects cannot pass through each other?

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

Rutherfordium has an atomic number of 104. How many protons and electrons does a neutral atom of rutherfordium contain?

Which gas is most abundant in Earth's atmosphere?

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

Which of the following is the smallest particle?

Which scientist described atoms as small, indivisible spheres that could not be divided into anything smaller?

Which statement best describes the difference between the orbit model and the electron cloud model of the atom?

Which of the following best defines an element?

Which term describes a pure substance that is made up of only one type of atom?

Is it accurate to say that a textbook is about 99.9 percent empty space, based on the structure of atoms?