Structure of Matter
The smallest unit of a substance that retains the substance's properties is called a(n)
Atom
Columns of the Periodic Table are called _____.
Groups/ families
A property of matter that describes a substance's ability to change into a different substance is a ______________ property.
Chemical
This "tells the story" of a chemical reaction.
Chemical equation
This is the unit used to measure all forms of energy.
This is the atomic model that shows the arrangement of electrons around a nucleus in fixed "shells" or energy levels
Bohr Model
The number of energy levels in an atom will ______ as you move down a family/ group of the Periodic Table.
Increase
The amount of space an object occupies compared to its mass is known as an object's ________.
Density
This type of bond is formed between a metal and a non-metal.
Ionic
Calculate the energy of a 45kg object moving at a rate of 10 m/s. Which type of energy does this describe?
2,250 J of kinetic energy
An atom of phosphorus has ____ neutrons.
16
The number of valence electrons in an atom is determined by using the _____'s place of the ________ number of an element.
One, Group/ Family
Sam mixes tomatoes together to make pizza sauce, he then puts the sauce, cheese, and pepperoni on the pizza crust. He bakes the pizza at 425 degrees for 18 minutes. In which part of this process will a chemical change occur?
Baking the pizza
An insoluble solid formed during a chemical reaction is called a ______________ and is an ___________ that a chemical reaction has occurred.
Precipitate, Indicator
Where would an object that is falling off of a building have equal amounts of potential and kinetic energy?
Halfway towards the ground
Which diagram(s) displays a mixture of elements and compounds?
C
Metals are to the ______ of the stair- step pattern, while _______ are to the right. The only exception is __________.
Left, Non- metals, Hydrogen
Which method of finding volume would you use to measure the volume of an irregular- shaped object?
Water displacement
Write the Lewis Structure for Magnesium Oxide (MgO)
[Mg]2+ [O]2-
You pull a cold bottle of sweet Coke Zero out of the refrigerator. Your hand feels cold after a few seconds. Why?
Thermal energy from your hand is going to the can, making your hand feel cooler because it is losing energy.
This is the name of the force that keeps the negative electrons in orbit around the positive nucleus.
Electromagnetic force
Valence electrons are so important because they determine the ________ of an atom/ element.
Properties/ Reactivity
Dissolving sugar into hot tea is an example of a ______________ change.
Physical
NaBr + Cl2 --> NaCl + Br2
2NaBr + Cl2 --> 2NaCl + Br2
Why must a hot air balloon operator decrease the flame size of the burner in order to land the balloon safely onto the ground?
To decrease the energy of the particles, causing them to condense and become more dense, causing the balloon to slowly sink back to the ground.