What is a cell?

1. the basic unit of atoms

2. the basic unit of structure and function in living organisms

3. the basic unit of molecules

4. the basic unit of life that eats and breathes for organisms

How is heavy water different from normal water

The half-life of strontium-90 is 28 years. how long will it take a 52 mg sample to decay to a mass of 13 mg?

How many lone pairs of electrons are on the s atom in sf4?

Fluorine exerts a pressure of 1.2 atm on a piston. When the pressure is changed to 1.1 atm, its volume is 556.1 mL. What was the original volume in mL? Solve the the nearest two decimal places.

How many electrons are needed to completely fill the second level energy? The third? The fourth?

What type of mixture is chicken noodle soup? A heterogeneous mixture, because the different components are mixed evenly within the substance A heterogeneous mixture, because the different components are mixed unevenly within the substance A

Quem criou a teoria do átomo

What is the Ph of. 00001 molar HCl solution? a. 1 b. 9 c. 5 d. 4

While washing his hands before the client consultation with Chloe, Jayden dropped some water onto the countertop. When he came back later to wipe it up, it has evaporated. What happened to the drops of water?

In terms of atomic structure, explain why the atomic radius of K is larger than that of Na