Calcium will loose one electron. Fluorine will gain one electron. Lithium will loose one electron. Argon will not loose any because it already has a full valence level. Aluminium will loose 3 electrons.
Answer: A
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The change concentration of the product of a reaction over time is best shown by line graph.
You use the vertical axis (normally y-axis) to show the concentration of the product and the horizontal axis (normally x-axis) to show the time.
In that way the several points may show a tendency that you can show as a line, and the slope of the line is the change of concentration divided by the time.
The cells get into your body by the lungs this answer is correct cause i had the same question and my teacher mark it correct