What does the number 7 mean in the following example-73Li? a. The number of protons
b. The atomic mass
c. The atomic number
d. The number of electrons

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Table sugar completely dissolved in water is an example of a?

What occurs when a cell engulfs large food particals