Atoms
the 3 subatomic particles
what is a proton, neutron, and electron
This particle is used to identify an element
what is number of protons?
These are vertical columns on a periodic table
What is a group?
What do you do with the big number in front of an equation?
multiply it with each number in the equation.
When a substance changes into another substance with different properties
What is a chemical change?
the location of protons and neutrons
What is the nucleus?
This number tells you the number of protons
What is the atomic number?
These are horizontal on the periodic table and tells you the number of energy levels.
What is a period?
These are found on the left side of a chemical equation
What is the reactants?
Is popped popcorn a chemical or physical change?
It is a physical change because the chemical properties of the kernel have not changed.
The atomic number is equal to these positive particles
What is a proton?
These determine how reactive an element is
What are valence electrons?
The atomic number tells us how many __________ an element has in its nucleus.
what is protons
These are found on the right side of a chemical equation
What is the product?
If you place Copper in a solution of Magnesium Sulfate
What is no reaction?
Which particle has the lightest mass
What is Electron
Name 1 element that reacts like Ar
What is helium, neon, krypton, xenon or radon
What is the rule of 2,8,8?
what is there can be 2 valence electrons in the 1st energy level and 8 in the 2nd and following energy levels?
6CO2 + 6H2O → C6H12O6 + 6O2 has how many oxygen in the reactants
What is 18?
color change, formation of a precipitate, formation of a gas, odor change, temperature change
What is signs of a chemical change?
a type of model where you plot the valence electrons on the energy levels
What is a bohr model?
On the periodic table, this tells you the number of valence electrons.
What is a group number?
These are the most reactive nonmetal group.
What is 7A or Halogens?
2C4H10O has how many atoms
What is 30?
Burning paper is considered a ____________ change.
What is chemical?