When the force of gravity is greater than the buoyant force what happens?
You sink
100
What is the definition of density?
mass per unit of volume, m/v
100
The atomic number indicates:
The number of protons and the number of electrons in a neutrally charged element
100
What is different between an isotope and a regular element?
The mass
100
How many valence electrons are in Oxygen, O?
6 Valence Electrons
200
When the force of gravity is less than the buoyant force, what happens?
You float
200
What formula would we use to find the mass when given density?
Density*Volume = Mass
200
The nucleus is composed of
Closely packed protons and neutrons
200
An isotope of mercury has 80 protons and 120 neutrons. What is the mass number of this isotope?
200
200
How many valence electrons are in Potassium, K?
1 Valence Electron
300
The buoyant force of an object is equal to
The amount of water the object displaces
300
A chef fills a 50 mL container with 43.5g of cooking oil. What is the density?
0.87 g/mL
300
Most of the volume of an atom is occupied by
the electron cloud
300
Determine the mass number of isotope sulfur-33
33
300
What kind of bond takes the electrons?
Ionic Bond
400
"EUREKA" is Greek for
I Found it!
400
A student finds that a cork displaces 23.5 mL of water and has a mass of 5.7 g. What is the density?
0.242 g/mL
400
Why are most elements neutral in charge?
number of protons is equal to the number of electrons
400
How many protons and neutrons are in one atom of Silicon-30?
14 protons and 16 neutrons
400
What kind of bond shares the electrons?
Covalent Bond
500
When an object's buoyant force is equal to the force of gravity what happens?
An object does not sink or float
500
A granite block has dimensions 20 cm X 5 cm X 10 cm. If it's mass is 2700 g, what is it's density?
2.7 g/cm3
500
What are protons and neutrons made of?
quarks
500
A sample of Element X is found to contain 72.15% of isotope type 1 (84.9118 amu) and 27.85% of isotope type 2 (86.9092 amu). Calculate the average atomic mass.
85.47 amu
500
Is the following element covalently or ionicly bonded?
NaCl