A change from one state of matter to another involves the transfer of

a. heat.

b. atoms.

c. phases.

d. density.

An element's atomic number is 40. How many electrons would an atom of this element have? An atom of element A has 111 protons.

Which of the following examples demonstrates a compression force? a plucking a guitar string b. squeezing a sponge c. pulling a wagon d. dropping an apple

3 students are working on an experiment about heat. They leave 4 objects in their classroom overnight with a thermometer in them. The 4 objects are a glove, metal tray, wooden block and a glass plate.

How many protons and electrons does an ion of Ca2 + have?

Determine the number of ions produced in the dissociation of the compound listed. CaO

Collagen is made of fibers and is found in tendons and cartilage. Collagen contributes to meat toughness and is, therefore, an example of which type of protein?

1. Why does CH30 evaporate faster than water?

How does concentration affect our daily lives in science?

How many nitrogen atoms are in 2.79 mo. of NH3

What is the chemical formula for polysaccharide?