How does the arrangement of atoms in a crystalline substance differ from the arrangement in a noncrystalline (amorphous) substance?
1. Atoms in amorphous materials are in an ordered array. In crystals, they are randomly distributed.
2. Atoms in crystals are located in a cubic array. In amorphous materials, they are hexagonal.
3. Atoms in crystals are closer together than atoms in amorphous materials.
4. Atoms in crystals are in an ordered array. In amorphous materials, they are randomly distributed.

Which metal exist in liquid state and can be cut with knife ?

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

Part 1: include important facts found through your research. part 2: include your visual display. include your summary of “the chemistry of water” from the national science foundation website. include your experiment. part 3: include responses to the reflection questions.