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.
Question 4
4.
Question 5
5.
Which characteristic of an atom is NOT used to determine the number of neutrons in an atom?
Protons
Atomic number
Atomic mass
Electric charge
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?
Silicon is more reactive than aluminum and has properties similar to phosphorus.
Calcium is more reactive than arsenic and has properties similar to radium.
Xenon is nonreactive and has properties similar to iodine.
Cesium is nonreactive and has properties similar to francium.