Compounds & mixtures
Is Kool-aid a compound or a mixture
Homogeneous mixture
What is the name of the center of an atom
nucleus
where can you find the atomic mass of an element in the periodic yable
The bottom left of the element
Is an object's roughness a physical or chemical property
physical
What is another word for base
Alkaline
Is a box of nails and screws a homogeneous or heterogeneous mixture
heterogeneous
What is the particle that orbits the nucleus and has a negative charge
electron
What does the chemical symbol Cl stand for
Chlorine
Is something burning a physical or chemical change
Chemical change
What compound is at exactly 7 on the PH scale
water
What is the difference between a homogeneous and heterogeneous mixture
A homogeneous mixture is evenly mixed and you can't tell the pieces/ingredients apart, a heterogeneous mixture is the opposite
Name of the electrons in the outermost orbital of an atom
Valence electrons
How many groups of elements are in the periodic table
9
Is flammability a physical or chemical property
chemical
what is an indicator
A compound that changes color in the presence of an acid or base
What does this chemical formula NaCl make up
Table salt
How many electrons are allowed in the first orbital of an atom
only 2 electrons are allowed in the closest orbital, while 8 are allowed in every other one
how many elements are in the periodic table
118
What is the difference between a physical and chemical property
A physical property is something that can be observed without changing the substance, a chemical property is the ability to undergo a certain change
What is the PH scale
Its a scale of 1 - 14 that represents how basic or acidic a compound is, with 7 being neutral, the farther the compound is from 7, the more basic or acidic it is
Is a bag of candy a mixture or a compound
Its both because the candy itself is a compound, while all the candies in a bag is a heterogenous mixture
How do atoms interact with each other
Atoms use their valence electrons to bond with other atoms to make compounds
what is the most reactive group of the periodic table
alkaline metals
Is a candle burning a physical or chemical change
Both, the candles wick burning is a chemical change, while the candle melting is a physical change
What is the strongest acid in the world
Fluoroantimonic acid, with a PH of -31.3