Show:
Atoms
Density
Solubility
Chemical Properties
Physical Properties
100

what are the three main parts of an atom

Proton, neutron, electron 

100

What is the equation for density?

Mass/ Volume 

100

What is solubility?

The ability to be dissolved, especially in water
100

Burning is a chemical change. True or false 

True 

100

Is melting or boiling a physical change? Yes or no.

Yes because there is a change in state but no new material is formed.

200

What charge does a proton have?

Positive

200

Density measures an object's _________.

compactness 

200
What is a mixture?

Two or more substances that are not chemically combined

200

Define a chemical reaction.

A chemical reaction is a process in which one or more substances(reactants) are converted to one or more different substances(products).

200

Define a physical change.

Physical reactions may include changes in texture, shape, temperature, and state, without a change in the composition. No new substances are produced. 

300

What charge does a neutron have?

Neutral

300


Mass is a measure of the _______ an object.

amount of matter

300

In salt water what is the solvent?

Water 

300

In the chemical equation what is being produced:

2H2 + O2 --> 2H2O 

Water 

300

Is dissolving sugar in water a chemical or physical change?

Physical change. No new substances are formed, there are mixed together to create a mixture.

400

What determines what kind of element any given atom is?

The number of protons in the nucleus
400

Which term refers to the amount of physical space an object takes up?

volume 

400

In salt water what is the solute?

salt 

400

In the chemical equation for table salt:

2Na + Cl2 --> 2NaCl 

What is/are the reactant(s)?

2Na + Cl2

400

What are some different physical properties of water in it's three different states: solid, liquid and gas.

Solid(ice)- closely packed atoms, fixed shape, higher density

liquid- atoms are less closely packed, no fixed shape

gas- invisible, atoms are far apart, no fixed shape 

500
How many electrons can fit into the second valence shell?

8 electrons 

500

An object submerged into 50 cm^3 of water raises the water level to 65 cm^3. The mass of the object is 30 g. What is its density?

2 g/ cm^3

500

Is dissolving a solid into water is a physical or a chemical change.

Physical 

500

In the chemical equation for table salt:

2Na + Cl2 --> 2NaCl

What is/are the product(s)?

2NaCl

500

Is the ability to react with with acids or bases (pH) a physical or chemical change?

chemical