2. Atoms & Elements

How many electrons does a neutral potassium atom have?

Which of the following best describes a neutral atom?

Which statement about the nucleus of an atom is incorrect?

Which of the following is the atomic number of aluminum?

Silicon has an atomic number of 14 and a mass number of 28. How many neutrons are found in a silicon atom?

Where is most of the mass of an atom located?

Manganese has an atomic number of 25 and a mass number of 55. How many neutrons does a typical atom of manganese contain?

Which of the following statements best describes the structure of matter at the atomic level?

What is located on the outside of an atom?

Which statement best describes electrons in an atom?

Which of the following acts like fingerprints that identify atoms and molecules?

The chemical characteristics or reactivity of an element depend mostly on the:

The form of oxygen that combines three oxygen atoms into each molecule is called _____.

Which of the following best describes the formation of electron clouds in an atom?

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