How many protons and electrons are in an atom of sodium whose atomic number is 11?

When a chemical substance has either lost an electron or gained an oxygen?

The student observes that the blue color becomes less intense as the cell operates. State one inference that the student can make about the concentration of the Cu2 + ions based on the change in intensity of the color of the Cu (NO3) 2 (aq) solution

1. After 42 days a 2.0 g sample of phosphorus-32 contains only 0.25 g of the isotope. What is the half-life of phosphorus-32?

Fluorine, chlorine, bromine, and iodine are part of a family called what?

What is the main component of the earths ancient atmosphere?

In a closed system, if a gas is transported to a container with double the volume of the previous container, gas was held in, What is the gases' new volume?

Rebekah is studying a molecule and trying to determine if it is DNA or RNA. Which kind of molecule is she studying? carbohydrate protein nucleic acid lipid

The function of most proteins depends primarily on the

Compare the temperature of water as ice begins to form with the temperature of ice as it begins to melt?

Which elements are present in sugars?