What is the oxidation number for sodium?

A

2-

B

1+

C

2+

D

1-

How does a campfire involve energy? Is it endothermic or exothermic? What would be the system and what would be the surroundings?

Sir Isaac Newton lived in the 1600's. His laws of motion and gravity were written many years ago. Which of the following is true? A. Newton's laws are too old to be usable. B. Newton's laws have been disproved by modern scientists. C.

What is something that stores chemical energy?

Which is an example of an electrolytic cell? a battery a fuel cell a rechargeable battery a spontaneous reaction between lithium and copper

What is a solution? a mixture of two or more substances that are mixed evenly throughout a mixture of two or more substances that are chemically combined

What is true of an acidic solution at room temperature?

Why does a higher concentration make a reaction faster? There are more collisions per second and the collisions are of greater energy. Collisions occur with greater energy. There are more collisions per second.

A property of metals is high thermal conductivity which is

Do exorthermic reactions make surrounding hotter?

What's a certain indicator that a molecule is polar?