Particle Movement
Which substances vibrate alongside each other and move very little ?
solids
What happens to the pressure of a gas when its temperature increases, if the volume stays constant?
A. Pressure decreases
B. Pressure increases
C. Pressure stays the same
D. Pressure becomes zero
B
A rock has a mass of 150 g and a volume of 50 cm³. What is its density?
150 g ÷ 50 cm³ = 3 g/cm³
A substance has a density of 5 g/cm³ and a volume of 20 cm³. What is its mass?
Mass = Density × Volume
5 g/cm³ × 20 cm³ = 100 g
Which particle has a positive charge?
A. Electron
B. Neutron
C. Proton
D. Atom
PROTON
Which substances have the highest kinetic energy ?Solids, Liquids, or Gases
Gases
A sealed container of gas is heated from 20°C to 80°C. What happens to the movement of the gas particles and the pressure inside the container?
The particles move faster, collide with the container walls more often and with greater force, so pressure increases.
A metal block has a mass of 240 g and a volume of 30 cm³. Calculate its density.
240 g ÷ 30 cm³ = 8 g/cm³
A block has a mass of 200 g and a density of 4 g/cm³. What is its volume?
Volume = Mass ÷ Density
200 g ÷ 4 g/cm³ = 50 cm³
Which particle has no electrical charge?
A. Electron
B. Neutron
C. Proton
D. Ion
NEUTRON
Which substance rearranges based on the container it is in ?
Liquids
Why does the pressure inside a basketball increase when the basketball is left in a hot car?
Heating the basketball makes the gas particles move faster, causing more frequent/forceful collisions with the inside of the basketball, increasing pressure.
A liquid has a mass of 90 g and a volume of 100 mL. What is its density?
90 g ÷ 100 mL = 0.9 g/mL
A liquid has a density of 2 g/mL and a volume of 75 mL. What is its mass?
Mass = Density × Volume
2 g/mL × 75 mL = 150 g
Where are protons and neutrons located in an atom?
A. Electron cloud
B. Nucleus
C. Outer shell only
D. Outside the atom
B
Which substance has the lowest degree of kinetic energy ? Gases, Solids, or Liquids
Solids
As Pressure decreases, Temperature _________
decreases
An object has a mass of 500 g and a volume of 250 cm³. Calculate its density
500 g ÷ 250 cm³ = 2 g/cm³
An object has a mass of 360 g and a density of 6 g/cm³. What is its volume?
Volume = Mass ÷ Density
360 g ÷ 6 g/cm³ = 60 cm³
An atom has 8 protons, 8 neutrons, and 8 electrons.
a. What is the atomic number?
b. What is the mass number?
c. Is the atom electrically neutral?
a. Atomic number = 8
b. Mass number = 16
c. Yes, it is electrically neutral because it has equal numbers of protons and electrons.
Which states of matter are easy to compress ?
Gases
As Pressure Increases, Temperature __________
Increases
A sample has a mass of 72 g and a volume of 8 cm³. What is its density?
72 g ÷ 8 cm³ = 9 g/cm³
A material has a mass of 150 g and a volume of 30 cm³.
a. Calculate its density.
b. If another piece of the same material has a volume of 50 cm³, what would its mass be?
a. 5 g/cm³
150 g ÷ 30 cm³ = 5 g/cm³
b. 250 g
5 g/cm³ × 50 cm³ = 250 g
Which atomic particle is the lightest and floats around the atom looking to share or give
ELECTRONS