Question

Part 1: Name two elements that have the same properties as potassium (K). (4 points)

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

Answer 1

part 1: hydrogen and sodium? my memory is so bad ngl

part 2: 36 because there are 12 protons, 12 electrons, and 12 neutrons in an atom of magnesium.

Answer 2

Part 1: Sodium and Rubidium.

Part 2:

Protons = 12

reason: protons are equal to the atomic number of an atom. For Magnesium, atomic number is 12.

Neutrons:

`= { \tt{24 - 12 }} \\ = { \tt{12 \: neutrons}}`

reason: neutrons is given by formula:

`{ \tt{neutrons = mass \: number - atomic \: number}}`

where mass number of magnesium is 24.

electrons: = 12 electrons

reason: Magnesium atom has electrons summing up to 12