Select the correct answer from each drop down menu What causes atoms to form covalent bonds?
In a covalent bond, two atoms are held together by the attraction between
covalent bonds that an atom conform depends on the number of
The number of
in the stom

Measuring which physical property is most likely to produce the most precise results when trying to identify a substance

Which actions would increase the rate at salt dissolves in water? stir the water? crush the salt? use less water? heat the water? cool the salt

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