Chemistry and Physics Matter
Physics and chemistry are both the studies of ______ and ______
Matter and energy
What are the three main states of matter?
Solid, liquid, and gas.
What is an atom?
The smallest particle of an element that still keeps the properties of that element.
What is a chemical reaction?
A reaction that occurs when two or more chemical substances interact with each other and change into different chemical substances
How many energy levels does helium have?
2
Matter is defined as anything that has _____ and _____
Volume and mass
What is boiling point?
The temperature at which a liquid becomes a gas.
What is the charge of an electron?
Negative
What is a polymer?
A molecule made of repeating small molecules combined.
What is the charge of a neutron?
Neutral
What is mass?
How much stuff is inside a particular material.
What is the freezing point of water?
32 Degrees
How many protons does it (iron) have?
26
What is the pH of pure water?
7 (neutral)
What is a crystal?
A solid with a regular, repeating arrangement atoms.
Why is mass not always measured by weight?
Because objects do not have weight in space, but they have the mass in space.
What causes one state of matter to change into another state?
Heating and cooling
When is an atom unstable?
When it does not have all the valence electrons it needs to fill up the outershell.
What is a factor that can influence the rate of reaction?
Increasing concentration of the compounds that are being, heating, catalyst, etc.
What temperature is the boiling point of water?
212 degrees
How can we measure volume?
By immersing an object in liquid.
Which state of matter is composed of atoms that are frozen in place?
The solid state
What do the numbers inside the box of an element on the periodic table of elements represent?
The atomic number and the atomic mass.
What is an endothermic reaction?
A chemical reaction during which heat energy is absorbed.
Which element has 87 protons?