Science end of quarter 1 test!!!
Studied by 16 people
Learn
Practice Test
Spaced Repetition
Match
Flashcards1/54
Earn XP
Description and Tags
https://docs.google.com/document/d/1htl4uIkin7CTVibWXBjGZLMkDZKUBuIEM3MWIkreXw4/edit?usp=sharing (link to more balancing chemical equations practice! print out or make your own copy please!)
Name | Mastery | Learn | Test | Matching | Spaced |
|---|
No study sessions yet.
55 Terms
nucleus
middle, holds neutrons and protons
electron shells
outer rings, holds electrons
what charge do neutrons have
none
what charge do electrons have
negative
what charge do protons have
positive
How many electrons does a neutral oxygen atom have
8
How many protons does a neutral oxygen atom have
8
How many neutrons does a neutral oxygen atom have
8
What is another name for protons
Atomic number
How do you find the amount of neutrons in an atom.
Subtract the number of protons (atomic number) from the atomic mass.
When an ion has a negative charge does it have more electrons or protons?
electrons
When an ion has a positive charge does it have more electrons or protons?
protons
When an atom has a neutral charge does it have more electrons or protons?
it has the same number of electrons and protons
what is an ion
an ion is a atom without a neutral charge.
How many electrons can the first electron ring hold
2
How many electrons can every ring besides the first one hold
8
what are the valence electrons
the number of electrons on the most outer electron ring
How many valence electrons does column 1 have
1
How many valence electrons does column 2 have
2
How many valence electrons does column 13 have
3
How many valence electrons does column 14 have
4
How many valence electrons does column 15 have
5
How many valence electrons does column 16 have
6
How many valence electrons does column 17 have
7
How many valence electrons does column 18 have
8
What is the lewis dot method
a way to just show the valence electrons, its just dots around the element symbol
what is conversion of matter
Matter can not be created or destroyed. The number and types of atoms you start with (Reactants) must be the same number and types of atoms you end with (Products)
What is a reactant
what comes before the arrow in a chemical equation. The reactants become the products
What is a product
What comes after the arrow in a chemical equation. The products were the reactants.
What is yield
the arrow in a chemical formula. Indicates a chemical change
what is the 2 in o2 called
subscript
what is MgO in 2 MgO called
chemical formula
what is 2 in 2 MgO called
Coefficient
what is Au (gold) called in a chemical reaction
Chemical symbol
what is an element
a substance that cannot be broken down into another substance
What is a compound
a material formed by chemically bonding two or more chemical elements.
What does a subscript tell you?
How many atoms
What does a coefficent tell you?
how many atoms or molecules of the substance are involved in the reaction
How do you balance a chemical equation
The same number and types of atoms at the start (reactants) and the end (Products)
What column are alkali metals in
1
What column are alkaline earth metals in
2
What column are transition metals in
3-11
What column are noble gases in
18
What column are halogens in
17
where are non metals in the periodic table
right most triangle
Where are the metals in the period table
every element besides the right most triangle and hydrogen
What is the bohr model
a way to show all of the electrons, it is rings (electron shells) with dots in them around the nucleus
What does Ea (a is small) stand for
activation energy
What is activation energy
The minimum quantity of energy that must be reached in order for a reaction to occur
what is a exothermic reaction
a reaction that releases energy. products sit lower on an energy graph
What is an endothermic reaction
Absorbs energy to occur. products sit higher on an energy graph
What does a catalyst do
A castalyst lowers the activation energy in a system which causes the reaction to occur faster. This happens because many more collisions will result in a successful reaction.
What is a Delta (triangle) H in a reaction
the difference between the energy in a rectant and product
What does increasing temperature do in a reaction
speeds up a reaction