Unit Test 11/21 (Subatomic and Properties)

Which subatomic particle has a negative charge?

• Proton

• Neutron

• Electron

• Positron

What is the primary difference between an element and a compound?

• Elements are always gases, compounds are always solids

• Elements are always reactive, compounds are always stable

• Elements consist of one type of atom, compounds consist of two or more types of atoms

• Elements are natural, compounds are artificial

Which of the following is an example of a physical property?

• Flammability

• Reactivity with acid

• Melting point

• Ability to rust

In an atom, where are the protons located?

• Electron cloud

• Nucleus

• Neutron shell

• Valence level

Which of the following is a chemical property?

• Reactivity with oxygen

• Density

• Boiling point

• Malleability

What is the term for a pure substance composed of two or more elements in a fixed ratio?

• Mixture

• Solution

• Alloy

• Compound

Which subatomic particle has no electric charge?

• Proton

• Neutron

• Electron

• Ion

What type of mixture is homogeneous and has particles that don't settle out over time?

• Solution

• Suspension

• Heterogeneous mixture

• Emulsion

Which of the following is an example of a chemical change?

• Ice melting

• Salt dissolving in water

• Iron rusting

• Sugar grinding into powder

Tags

NGSS.MS-PS1-2

What is the smallest unit of an element that retains the properties of that element?

• Atom

• Molecule

• Compound

• Proton