Elements, Mixtures and compounds
The smallest unit of matter which has properties of a chemical element.
What is an atom?
This kind of mixture is very well mixed
What is homogeneous?
The subatomic particles (the parts of an atom.)
What are protons, neutrons, and electrons.
This is how you find the number of protons
What is the atomic number?
This is a change in size, shape, or phase only
What is a physical change?
This is the top number of the element square
What is the atomic number?
NaCl is an example of this kind of matter.
What is a compound?
What is a heterogeneous mixture?
The inner part of an atom, composed of protons and neutrons.
What is the nucleus.
What is the atomic number / same as the number of protons?
This is a change that forms a new substance
What is a chemical change?
This is the bottom number of the element square
What is the mass number (atomic mass)?
Hydrogen and Neon are examples of what state of matter at room temperature.
What is a gas?
This is a homogeneous mixture where one thing is dissolved in another.
What is a solution?
The charge of an electron.
What is negative.
This is how you find the number of neutrons in an atom
What is subtract the atomic number from the mass number?
Iodine turning black on starch was this kind of change
What is chemical?
What properties do most metals have?
Trail mix and air are examples of what type of material.
What are mixtures?
This is the solid (powder) part of a solution that dissolves
What is a solute?
The charge of a neutron.
What is no charge or neutral.
This is the number of electrons that can fit on the 2nd level of an atoms
What are 8?
Sugar dissolving in tea is this kind of change
What is physical?
What are gases, dull, brittle, nonconductive?
How could you separate salt from sea water?
What is heat it, boil it or let it evaporate. (Any one of these are correct!)
What is a solvent?
Atoms always have the same number of these
What are electrons and protons?
This is another word for the outer electron level of an atom
What is valence?
These are ways to tell that a chemical change has occurred
What are color change, gas is produced (smell or bubbles or fizz), a solid is formed, bright light or temperature change, etc?
All elements in a column (group) have the same number of these in their valence levels
What are electrons?