Elements, Mixtures and compounds
The smallest unit of matter which has properties of a chemical element.
What is an atom?
Two or more elements chemically bonded together are called
The subatomic particles (the parts of an atom.)
What are protons, neutrons, and electrons.
This diagram shows only the valence electrons
What is a Lewis Dot Structure
This tells the number of protons in an atom.
What is the atomic number?
What is a heterogeneous mixture?
A process that involves the rearrangement of atoms to form new substances.
What is a chemical reaction?
The inner part of an atom, composed of protons and neutrons.
What is the nucleus.
This diagram shows all protons, neutrons and electrons
What is a bohr model?
Anything that has mass and takes up space is a kind of
What is matter?
Hydrogen and Neon are examples of what state of matter at room temperature.
What is a gas?
These are used in bonding and found where?
What are valence electrons which are found in the outermost ring?
The charge of an electron.
What is negative.
Draw a bohr model of oxygen
8e-
8p+
8n0
These cannot be broken down into simpler substances; everything around us is made up of combinations of them.
What are elements or atoms?
Soil and air are examples of what type of material.
What are mixtures?
This tells you how many rings a bohr model will have
The charge of a neutron.
What is no charge or neutral.
Draw a lewis structure of Fluorine
: F :
.
The study of matter and how it changes is called
What is chemistry?
How could you isolate salt from sea water?
What is heat it, boil it or let it evaporate. (Any one of these are correct!)
When a mixture visually looks all the same
What is a homogenous mixture?
Atoms share these when they bond.
What are valence electrons?
Draw a Bohr model of CA
4 rings
2 VE
20 e-
20 p+
20 n0
Total number of Neutrons and Protons is called
What is the atomic mass, weight?