The mass number is

A. use the atomic number

B. mass number - atomic number

C. number of protons and neutrons in an atom

Marx believed that the revolution would lead to communism or a. a classless society. c. a society based on skill not money. b. a worker-dominated society. d. life in utopian communities.

What level of Organization is shown in the human heart

Is Cytoplasm found in animal cells, plant cells or in both?

A compass is wrapped in a coil of wire that is connected to a switch and battery. Which statement best explains why the compass needle turns when the switch is closed?

Drag each tile to the correct box. Match each set of energy sublevels to the principal energy level that contains them. S sublevel s and p sublevels S, P, and d sublevels third energy level first energy level second energy level

How many valence electrons in Al3+?

What can be done to make an solid solute dissolve faster in a liquid solvent

Why does the water cycle happen fast in some places and slowly in other places?

Why does the mood have phases

According to Arhennius, which of the following is a base? * A. HCl B. HNO3 C. NaCl D. NaOH