Use the portion of the periodic table shown below to answer the questions.
A portion of the first three columns of the periodic table is shown. Column one from top to bottom reads 11 sodium 22.990, 19 potassium 39.098, and 37 rubidium 85.468. Column two reads 12 magnesium 24.305, 20 calcium 40.078, and 38 strontium 87.62. Column three reads 21 scandium 44.956 and 39 yttrium 88.906.
Part 1: Name two elements that have the same properties as calcium (Ca).
Part 2: Determine the number of protons, electrons, and neutrons present in an atom of sodium (Na). Explain how you determined your answer using complete sentences.
Part 1: Two elements that have the same properties as calcium (Ca) are magnesium (Mg) and strontium (Sr).
Part 2: Sodium (Na) has an atomic number of 11, which represents the number of protons in an atom of sodium. Since atoms are electrically neutral, sodium also has 11 electrons. To determine the number of neutrons, we can subtract the atomic number from the atomic mass. From the given information, the atomic mass of sodium is not provided, so we cannot determine the exact number of neutrons present in an atom of sodium.