Molecular Structure
What is in the nucleus of an atom
Protons and neutrons
When a liquid changes to a solid what is that change called?
FREEZING
Are molecules tightly packed together in solids?
Yes they are very tightly packed
Is breaking glass a physical or chemical change?
It is Physical
When molecules are heated do they have more or less energy?
The molecules have more energy
what is the charge for an electron?
Negative
To get from a gas to a liquid do you add or remove heat?
You remove heat energy
How are liquid molecules packed together?
Loosley packed
What is a chemical change?
When a change occurs that changes the properties of the substance
When molecules get cooled do they expand or contract?
They contract
Where are electrons located in the structure of the atom?
The outer shell
What is sublimation?
When anything solid turns into a gas without first becoming liquid
What state of matter has the most energy?
PLASMA
What is a physical change?
When a substance changes appearance or texture but doesn't change the substance
In the summertime when a door gets heated why does it get jammed in the doorway
When molecules get heated the space in the molecules expands so the door will expand and then it will therefore get stuck.
What does the atomic number stand for on the periodic table of elements?
The number of protons
When does condensation occur?
When a gas changes to a liquid condensation occurs
What state of matter takes the shape of its container?
Liquids
Is a leaf changing color a physical or chemical change
Chemical Change
when molecules get cooled do they have more or less energy?
Less energy
How many protons are in oxygen
8
When liquid changes to a gas what is it called?
Vaporization
What state of matter takes up most of the universe?
PLASMA
When you stir water and lemons is that a physical or chemical change?
Physical
Are molecules more tightly packed in hot molecules or cold molecules?
In cold water, the molecules are moving a little slower so there more tightly packed