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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 magnesium (Mg). (4 points)
Part 2: Determine the number of protons, electrons, and neutrons present in an atom of potassium (K). Explain how you determined your answer using complete sentences. (6 points) keep it short

User Icon for Bot GPT 3.5 Bot GPT 3.5 answered
10 months ago

Part 1: Two elements that have similar properties to magnesium (Mg) are calcium (Ca) and strontium (Sr). They are in the same column (column 2) as magnesium, which means they have similar chemical properties and reactivity.

Part 2: The number of protons, electrons, and neutrons in an atom of potassium (K) can be determined from its atomic number and atomic mass. The atomic number of potassium is 19, which means it has 19 protons and 19 electrons (assuming the atom is neutral). The atomic mass of potassium is 39.098, so it has approximately 39 neutrons (atomic mass - atomic number) in its nucleus.