Answer:
left to right across a period when it decreases and when it increases top to bottom in a group,
hope i helped
Answer:
A chemical change because a temperature change occurred, the solid disappeared and a gas was produces
Explanation:
Magnesium reacts with hydrochloric acid releasing energy, and leading to the formation of magnesium chloride and hydrogen gas. This is represented by the equation below:
Mg₍s₎ + 2HCl₍aq)⇒ MgCl₂₍aq₎ + H₂₍g₎
2 hydrogen and 1 oxygen makes water
Answer:
Explanation:B ice melting is a phiyscal change and the mass of the substance remains the same
