Matter
What is an acid? What is a base?
Acid- below 7 pH.
Base- above 7 pH.
Who discovered the atom?
John Dalton
Who organized the periodic table?
Dmitri Mendleev
Tearing, melting, freezing, and kicking are examples of ___________________ changes.
Physical
What are the three main temperature scales?
Celcius, Kelvin, and Fahrenheit
What are the four states of matter?
Solid, liquid, gas, and plasma.
The center of the atom is called the __________, and it contains _____________ & ______________.
Nucleus, protons and neutrons
The periodic table is arranged by... (atomic mass or atomic number)
Atomic Number
Burning, rusting, and reacting with oxygen are all examples of _____________ changes.
Chemical
Over the break, some delicious food was probably cooked in an oven. An oven works by heating up the air, which cooks the food inside. This method of heat transfer that involves heated gas is called............
Convection
What is an element?
Where are electrons located?
Electron cloud, around the nucleus
On the periodic table, columns are called __________, and rows are called _____________.
Groups/families, periods
When two nuclei collide and fuse together, producing tons of energy (like on the sun), this is known as Nuclear _______________.
Fusion
Due to climate change, it was unusually warm during winter break. To take advantage of the warmth, several of you probably went outside to play and feel the sun. Feeling the sun's warmth is an example of..........
Radiation
What is the difference between a compound and a mixture?
A compound is two or more elements that are chemically combined, a mixture is two or more substances that are physically combined.
Protons have a ________ charge, neutrons have a ___________ charge, and electrons have a ____________ charge.
Positive, neutral, negative.
The most reactive elements are called the ____________, and the most nonreactive are called the ________________.
Alkali Metals, Noble Gases
When a nucleus splits apart into smaller nuclei, such as how we produce energy in power plants, this is known as Nuclear _______________.
Fission
Over the break, I burned my hand by grabbing a mug of boiling hot water. The mug burned my hand by...........
Conduction
Element- H ,N, O, C, Au, Ag, Si, etc.
Compound- NaCl salt, C6H12O6 sugar, H2O water, ammonia, vinegar, etc.
Mixture- air, salad, pizza, cereal, etc.
What has more mass, the nucleus or the electron cloud?
Nucleus
A reaction between a metal and a nonmetal is called a/an (ionic bond or covalent bond).
Ionic Bond.
In a balanced chemical equation, the ingredients on the left are called __________, and the result on the right are called the __________.
Reactants and Products
What is the difference between heat and temperature?
Heat is the amount of thermal energy, temperature is how that energy is measured (or average energy)