An element is a pure substance
Answer:
B. negative charge only
Explanation:
The saying "opposites attract" is true in the case. Since the rod is positively charged, the sphere must have a negative charge to be attracted to it.
A sphere that is positively charged would be repelled from the rod, and a neutral sphere would not be attracted or repelled.
Answer:
Color.
Explanation:
Hello,
In this case, since matter has a lot of properties regarding its physical condition and chemical composition, those related to the appearance of matter are physical. In such a way, since the student observed to different substances with also different colors, we can infer that the property of matter that was observed in the scenario was color, which accounts for the graphical perception we have from them.
Best regards.
It increases across a period and decreases down a group. A good way to remember this is that fluorine is the most electronegative atom, and it's to the top right of the table.
