2. Atoms & Elements

How many electrons are present in a neutral atom of lithium?

Which of the following can vary without changing the identity of an atom?

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

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

Which of the following particles are found in the nucleus of an atom?

Which of the following best describes the charge of an electron?

Surrounding every moving electron is:

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

Which phrase accurately describes an atom?

What is the approximate nuclear radius r of the isotope 208 82Pb (lead-208)?

Which of the following best describes what composes an element?

Where are protons and neutrons found within an atom?

An atom's atomic number is 7. Its valence is most likely:

How many protons are present in the nucleus of a standard hydrogen atom?

The reactivity of an atom arises from: