Which statement describes evidence of chemical reaction

An element with 20 protons and 20 electrons gains one electron. the electron goes into what type of orbital?

4. Based on the density of the wood that you calculated above, would the wood float or sink if it is placed in a bowl of water? Explain your answer. Remember that the density of liquid water is 1.00 g/cm3.

An elements atomic number is 57. How many protons would an atom of this element have?

Why do you need to think about polarity of the different ingredients in your salad dressing in order for it to turn out well?

Which atom would it be most difficult to remove an electron from

What volume 12.6 M HCL must be added to enough water to prepare 5.00 litters of 3.00 M HCL?

What are the two main types of exact numbers?

A balloon is filled with helium gas. What will happen as the average kinetic energy of the helium particles increases? The balloon will decrease in total volume. The temperature of the balloon will decrease.

Using retosynthetic analysis, complete the synthesis of 2-pentanone from ethanol, proceeding through a keto ester as the synthetic intermediate. g

An unknown or changeable quantity is called a (n) ...