2. Atoms & Elements

Given a diagram of an atom showing 6 protons, 6 neutrons, and 6 electrons, which of the following correctly completes the table for atomic number, mass number, and element symbol?

How many protons are present in a neutral chlorine (Cl) atom?

How many protons are present in a hydrogen atom?

An atom would become a different element if which of the following characteristics changed?

Which of the following elements has exactly 8 protons in its nucleus?

What is the mass number of an atom that contains 5 protons and 7 neutrons?

Which subatomic particles do not affect the stability of the atom?

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

How many electron shells are present in a neutral sulfur atom?

Which of the following atoms would be electrically neutral?

Which of the following is the number of neutrons in the most abundant isotope of boron?

Which of the following pairs of atomic models represent the same element?

An atom with an atomic mass of 89 and an atomic number of 39 has how many neutrons?

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

The atomic number of sulfur is 16. This indicates that a sulfur atom contains: