2. Atoms & Elements

Which statement best describes the atoms of the gas neon?

If an atom has 17 protons, which element is it?

Which of the following best describes how molecules differ from atoms?

What is the overall charge of an atomic nucleus?

Which characteristic of an atom always determines the identity of an element?

An atom has a mass number of 30 and contains 16 neutrons. What is the atomic number of this atom?

In the context of atomic structure, how many different kinds of protons are present in a molecule of H2O?

How many protons are present in a neutral atom of tungsten (W)?

Neon is a gas made up of only one type of atom. Which term best describes neon?

How many electrons does a neutral barium (Ba) atom have?

Which of the following is the atomic number of cobalt?

Which of the following is the number of protons in a zinc (Zn) atom?

How many electrons can the first energy level (n = 1) of an atom hold?

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

Which of the following is closest to the precise mass of a neutron?