Question

the chemical symbol for the element calcium is ca. what would be the symbol representing calcium atoms that have lost two electrons?
○ ca⁻
○ ca⁺
○ ca⁻²
○ ca⁺²

Explanation:

Step1: Recall ion formation

Atoms lose electrons → positive ions (cations). Calcium (Ca) has 2 valence electrons, loses 2 → +2 charge.

Step2: Identify correct symbol

Ion symbol: element symbol + charge. Charge of +2 is written as \( \text{Ca}^{+2} \) (or \( \text{Ca}^{2+} \), but option has \( \text{Ca}^{+2} \)).

Answer:

\( \text{Ca}^{+2} \) (the option with \( \text{Ca}^{+2} \))