Measurements & Units
This metric unit is commonly used too measure the mass of a small object, such as a paper clip.
What is a gram??
Density describes how much matter is packed into a certain amount of space or volume.
What is Mass?
Matter that has a definite composition and consistent properties is called this.
What is a pure substance?
What is a physical property?
This subatomic particle has a positive charge and is located in the nucleus.
What is a proton?
This unit is commonly used to measure the volume of a liquid in a graduated cylinder.
What is a milliliter (mL)?
This is the formula used to calculate density.
What is density = Mass/ Volume or D = M/V?
Oxygen gas, O2, is an example of this type of pure substance.
What is an element?
Color, melting point, boiling point, and density are examples of this type of property.
What are physical properties?
This subatomic particle has no charge and is located in the nucleus.
What is a neutron?
The temperature of water freezes at this value in degrees Cellsius.
What is 0 degrees Celsius?
A sample has a mass of 20 g and a volume of 5 mLL. What is its density? (Include units in your answer)
What is 4 g/mL?
Water, H2O, is made from hydrogen and oxygen chemically bonded together. It is an example of this type of pure substance.
What is a compound?
Thhe ability of a substance to unndergo a chemical change and form a new substance is called this type of property.
What is a chemical property?
This negatively charged subatomic particle is found in the electron cloud or energy level surrounding the nucleus.
What is an electron?
A balance measures this property of Matter. The common unit is the gram.
What is Mass?
A material has a density of 2 g/mL and a volume of 15 mL. What is its mass? (Include units in your response)
What is 30 g?
This type of mixture has a uniform composition throughout, such as salt water that has been thoroughly stirred and dissolved.
What is a homogeneous mixture or solution?
Flammability, reactivity with acid, and the ability to rust are examples of this type of property.
What is a chemical property?
The number of protons in an atom determines this value.
What is the atomic number?
A student measures a liquid as 35.0 mL and a solid object as 12.5 g. Identify both the measured quantity and unit for each value.
What is 35.0 mL for volume and 12.5 g for Mass?
An unknown metal has a mass of 54 g and a volume of 20 mL. A reference chart lists the density of aluminum as 2.7 g/mL and the density of water as 1.0 g/mL. Is the unknown likely aluminum and will the unknown float or sink in water?
Yes it is aluminum because it matches and it will sink because its density is greater than water.
Classify each sample as an element, compound, homogeneous mixture, and a heterogeneous mixture.
soil, carbon dioxide, air, gold
What are a heterogeneous mixture, a compound, a homogeneous mixture, and an element?
Classify each statement as a physical or a chemical property:
1. Copper conducts electricity
2. Iron reacts with oxygen to form rust.
3. Water boils at 100o C.
1. What is a physical property?
2. What is a chemical property?
3. What is a physical property?
Identify the number of protons, neutrons, and electrons for this sodium ion using its nuclear notation:
2311 Na +1
What are 11 protons, 12 neutrons, and 10 electrons?