Match the following items.
1. used in engines and rockets
2. a type of slow combustion
3. a chemical change
4. electron loss when combining with another element
5. element in bone which absorbs x-rays
6. reaction in which the product is glucose
oxidation
respiration
photosynthesis
calcium
souring
rapid combustion

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided

No copying 15 pts how does a free-body diagram tell you about the net force on an object?

When the mercury level in a barometer decreases that atmospheric pressure has