Chemistry Flashcards
What are the two subatomic particles inside a Nucleus
Protons and Neutrons
What are the subatomic particles on the orbits
Electrons
What are the 3 subatomic particles
Protons, Neutrons and Electrons
Which subatomic particle has a positive charge
A proton
Which subatomic particle has a negative charge
A electron
Which subatomic particle has a neutral charge
A neutron
What is the mass number
The number of protons and neutrons in a nucleus
What is the Atomic number
The number of protons in the nucleus
How do you find the number of neutrons in a nucleus
you subract the atomic number off of the mass number
Which is bigger the atomic or mass number
The mass number
How many electrons can the first orbital hold
2
How many electrons can the outer orbitals hold
8
What are the columns of the periodic table called
Groups
What is an element
A substance that can’t be broken
What are the rows of the periodic table called
Periods
Who made the period table
Dmitri Mendeleev
Why was Mendeleev’s prototype of the periodic table famous
Becuase he could predict future elements
What is a compound
One chemical element held together by chemical bonds
How do you know if a chemical reaction has occurred
- Change in colour
- Change in temperature
- Production of light
- Emission of sound
- Distinctive smell
- Effervescene
What is the Law of Conservation of Mass
Mass is neither created nor destroyed in ordinary chemical and physical changes
Name one characteristics a collision must have for it to occure
- Speed
- Hitting each other orrianted
How do you increase the number of collisions
Increase temperature
What is an independent variable
An independent variable is a variable that stands alone and isn’t change by the other variables you a trying to measure
What is a dependent variable
the variable that changes as a result of the independent variable manipulation
