Chapter 4: Molecular Structures- REVIEW

What is matter with a composition that is always the same called?

• Atom

• Molecule

• Substance

• Element

What is a small particle that makes up most types of matter?

• Molecule

• Atom

• Electron

• Proton

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

What is a group of atoms held together by chemical bonds called?

• Nucleus

• Element

• Molecule

• Electron cloud

Tags

NGSS.MS-PS1-1

What is the positively-charged center of the atom that contains protons and neutrons?

• Electron cloud

• Nucleus

• Molecule

• Valence electrons

What are positively-charged particles found in the nucleus called?

• Neutrons

• Electrons

• Protons

• Valence electrons

What are neutral particles with no charge found in the nucleus?

• Electrons

• Protons

• Neutrons

• Valence electrons

What are negatively-charged particles that surround the nucleus?

• Protons

• Neutrons

• Electrons

• Valence electrons

What is the area where electrons are likely to be found called?

• Nucleus

• Electron cloud

• Molecule

• Element

What are electrons found on the last level of the electron cloud in an atom called?

• Protons

• Neutrons

• Valence electrons

• Molecules

What is matter made of only one kind of atom that cannot be broken down into simpler substances?

• Molecule

• Element

• Substance

• Atom