Within Period 2 of the Periodic Table, what happens as the atomic number increases?
a) The number of electrons within the atom decreases.
b)The atomic mass decreases.
c)The atomic radius increases.
d)The volume of the atom decreases.

Achef makes salad dressing by mixing oil, vinegar, and spices, as shown. which type of matter is the salad dressing?

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '