20 point help now Which of the following would be a clue that a rock is sedimentary? A
No fossils or layers can be seen.
B
There are small clear, hard crystals visible.
C
The rock crumbles easily in your hand.
D
There are ribbon-like bands of minerals.

What is the maximum number of electrons that an atomic orbital can contain?

After watching the video "zinc strip in copper nitrate solution", and reading the instructions, click on the link labeled "start" just below the drawing of the pencil tip. follow the direction to complete the 3x3 grid. answer the below questions for the portion of the activity in which sn(s) is placed in agno3(aq)

8. what happens to matter during a chemical reaction