In which orbital does an electron in a silicon atom experience the greatest effective nuclear charge? a. 3p.
b. 2s.
c. 3s.
d. 1s.
e. 2p.

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

What is a difference between a mixture of elements and a mixture of compounds

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes or no?