2. Atoms & Elements

Which of the following is considered the fundamental building block of all matter?

How many electrons are present in a neutral calcium atom?

Which of the following statements about magnesium is correct?

Which part of an atom contains most of its mass?

Which statement best describes the relationship between the atomic number and the number of protons in an atom?

How many protons are present in an atom of tin (Sn)?

How many protons are present in an atom of nickel (Ni)?

Where is most of the atom's mass located?

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

Which of the following is a substance that is made up of only one type of atom?

Atoms are chemically the most stable when which of the following occurs?

How many protons are present in an atom of zinc?

Which of the following best describes the difference between elements and molecules?

Which subatomic particle determines the identity of an element?

Why is the nucleus of an atom positive in charge?