Chapter 4 Part 2

What is the smallest unit of any elemental substance that maintains the characteristics of that substance?

• Molecule

• Atom

• Cell

• Compound

Why can't atoms be seen even through a powerful microscope?

• They are too large

• They are extremely tiny

• They are transparent

• They are constantly moving

What are the smaller parts that each atom is composed of?

• Molecules

• Subatomic particles

• Cells

• Compounds

What is the electrical charge of a proton?

• Negative

• Neutral

• Positive

• No charge

What is the electrical charge of a neutron?

• Positive

• Negative

• Neutral

• No charge

Where are protons and neutrons located in an atom?

• Electron cloud

• Outer shell

• Nucleus

• Orbitals

What is the electrical charge of an electron?

• Positive

• Neutral

• Negative

• Double positive

How do electrons prefer to move?

• Individually

• In pairs

• In groups of three

• In a straight line

What is the space occupied by a pair of electrons in an atom called?

• Shell

• Layer

• Orbital

• Field

What does an orbital resemble?

• A straight line

• A spiral

• Concentric layers around the nucleus

• A random pattern