Chemistry Midterm Review

Which particle has a mass so small, it is considered to be 0 amu?

• proton

• hydrogen nucleus

• neutron

• electron

What quantity is the same among atoms of the same element?

• mass number

• atomic number

• number of neutrons

• number of nucleons

An atom that has 8 protons and 10 neutrons is an isotope of the element

• nitrogen

• oxygen

• fluorine

• neon

A mixture that is NOT evenly distributed is called ....

• Compounded
• Homogenous
• Heterogenous
• Salty

What is the formula for density?

• density = mass x volume
• density = mass / volume
• density = mass + volume
• density = mass - volume

What units can be used to express density?

• g/mL
• grams
• millimeters
• milliliters

A bar of copper has a mass of 216g and a volume of 24cm³. What is the density of copper?  

• 9g/cm3
• .11g/cm3
• 5184g/cm3
• 322mL

What kind of properties can only be observed when a substance changes into a different substance?

• physical properties
• chemical properties

Properties that can be observed without changing the identity of the substance.

• Physical
• Chemical

Example for chemical property

• color
• hardness
• toxicity
• solubility