Atomic Structure
What is equal to an atom's atomic number?
What is a proton
Name 2+ pieces of evidence that a chemical change has occurred
Change in color, gas released, change in temperature, precipitate formed, light released
Rows in the periodic table are known as this..
Periods
A+X -> AX , is an example of this type of reaction
synthesis reaction
Mass number is found by adding the following subatomic particles
What is the Protons & Electrons
When you dissove salt into water, which one of these is the solute?
Salt
To the right of the metalloids on the periodic table is this group of elements
What are metals
write the formula for 2 molecules of 2 Iron bonded w/ 3 Oxygen
2Fe2O3
mass/volume is the equation for this physical property
what is density
This is the group thtat includes the most reactive metals
What are alkali Metals
In an Endothermic reaction, energy does this
absorbed into the chemical bonds
Compound formulas start with an H (Hydrogen atom)
Acids
The charge of an electron is..
negative
An object has a density of 2.1 g/mL
Will it float in water?
No.
Water has a density of 1 g/mL. Anything denser will sink & vice versa
This group is entirely non-reactive to other elements
What are noble gases
2In H2 + O -> H2O
List the reactants
H2 + O
pH of water is
7
What is the isotope name of an atom with 6 protons, 5 neutrons, and 6 electrons?
Carbon-11
This is the phase of matter in which particles carry the most energy, move the fastest, and are spread the farthest apart.
what is gas
How many electron shells & valence electrons does a neutral atom of oxygen have?
2 shells
6 valence electrons
Name the following compound with proper prefixes
SO3
Sulfur tri-oxide
Compounds usually end with an OH (Hydroxide)
Base