A scientist determines an unknown metallic sample to have 77 protons and 77 electrons with a mass number of 192. How many neutrons does one metal atom contain? Fill in the bubbles to record your answer. Be sure to use the correct place value.
Which characteristic of an atom is NOT used to determine the number of neutrons in an atom?
Which table accurately displays the electrical charge for each subatomic particle in an atom?
Which model has properties most similar to chlorine?
Based on information provided in the periodic table, which statement correctly describes the reactivity of elements?