Shameeka is studying for an exam. she took the notes below about calcium and chlorine, which are known to form ionic bonds. calcium, which is a metal, donates 2 electrons to chlorine. the individual calcium atoms become ions with a negative 2 charge. the bond between calcium and chlorine makes the atoms stable. calcium and chlorine attract each other. which best describes shameeka’s error? calcium is a metal, so it donates protons, not electrons. the individual calcium atom has a positive, not negative, 2 charge. the bond formed makes the atoms unstable, not stable. calcium and chlorine repel, not attract, each other.

Answer is: The individual calcium atom has a positive, not negative, 2 charge.

Calcium cations (Ca²⁺) and chlorine anions (Cl⁻) will form ionic compound (salt) calcium chloride (CaCl₂).

Calcium cations and chlorine anions have a crystal structure in this solid inorganic salt. Ions have the ordered arrangement.

Electron configuration of calcium atom: ₂₀Ca 1s² 2s² 2p⁶ 3s² 3p⁶ 4s².

Atomic number of calcium is 20, it means that it has 20 protons and 20 electrons, so atom of calcium is neutral.  

When calcium lost two electrons, it will have 20 protons (positive charge) and 18 electrons (negative charge), which means it has two protons more and it has +2 oxidation number.

answer: the primary difference between a hypothesis and a theory is that b hypothesis is falsifiable, but a theory has been proven to be correct. theory is an explanation of something that is happening but hypothesis is a guess of something that can happen

explanation: