How many valenceelectrons does rare earth metals have

3. The variable that is observed during an experiment is called what type of variable?

when light waves hit ice most of the bounce off and radiate back into space because of this, it can besaid be said that ice is a (n) ... surface

What are the oxidation numbers of potassium, sulfur, and oxygen, respectively, in k2so4?

You should plan daily activities for extended staying guests. True False

What is the molar mass of chcl3?

Which of the following statements about transition metals is true? a. They are never found uncombined in nature. b. They include familiar metals such as gold, silver, copper, and nickel. c.

Elements can be separated from one another. Question 6 options: True False

One gram of lipid yields about 9kcal of energy. that is due to the high abundance of which chemical element?

Which of the following happens during a chemical change? Check all of the boxes that apply 0 One atom or more changes into atoms of another element. New substances with different properties are formed. O Solids, liquids, or gases may form.

The energy derived from the movement of H + ions down an electrochemical gradient from the intermembrane space into the matrix is used to drive the synthesis of ATP. How many H + ions must be moved into the matrix for the synthesis of 1 ATP?