Chapter 11 Matter and Atoms

A small particle that is the building block of matter is a(n)

• proton

• nucleus

• atom

• electron

What is a substance?

• A matter with a composition that is always the same.

• Anything that has mass.

• Matter that can vary.

• Something that is uncut.

A molecule is defined as

• things that have no mass or matter.

• two or more atoms that are held together by chemical bonds and act as a unit.

• an arrangement of particles that is the same throughout the mixture.

• anything that has mass and takes up space.

Which of the following describes the relationship between atoms, elements, and compounds?

• An element is composed of two or three kinds of atoms.

• A compound is composed of one element.

• One element is composed of the same atoms.

• An element is composed of just one kind of atom. A compound is composed of more than one element, each of which is a composed of a different type of atom.

Each proton has a ______________ electrical charge.

• positive

• negative

• neutral

• shocking

Each electron has a ________________ electrical charge.

• positive

• neutral

• negative

• shocking

Each neutron has an electrically _________________ charge.

• positive

• negative

• neutral

• shocking

What are atoms that have the same number of protons, but different numbers of neutrons?

• Ions
• Isotopes
• Elements
• Compounds

In the picture, what is the atomic number?  

• Au
• 79
• Gold
• 197.0

What is the core of an atom?

• Proton
• Atom
• Nucleus
• Energy Level