2. Atoms & Elements

What is the atomic number for an element with three protons?

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

An ion has 107 electrons, 107 protons, and 109 neutrons. What is the mass number of this ion?

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

Which of the following is the most commonly used inert gas in laboratory and industrial applications?

Which element has an atom that contains exactly 8 electrons in its neutral state?

If you have 2.00 grams of 13C, how many atoms of 13C are present in this sample?

How is the charge of a proton related to the charge of an electron?

How many electrons are present in a neutral bromine atom?

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

The fusion of which element in stars has resulted in the creation of all other heavier elements through nucleosynthesis?

In which 1.0-gram sample are the particles most likely arranged in a crystal structure?

An ion has 108 electrons, 108 protons, and 110 neutrons. What is the mass number of this ion?

Which of the following determines the ground state electron configuration of an atom?

How many protons are present in a neutral carbon atom?