Inv6.Exp1 Vocabulary

1. According to Dalton's atomic theory, what is true about atoms of the same element?

• They have different masses
• They are identical to one another
• They have different chemical properties
• They can be divided into smaller particles

2. What was a major modification to Dalton's original atomic theory?

• The discovery that atoms can be divided into subatomic particles
• The discovery that atoms are spherical
• The proof that atoms don't exist
• The finding that atoms can't bond together

3. What is the term for different molecular arrangements of the same element?

• Compounds
• Molecules
• Allotropes
• Isotopes

4. What fraction of an atom's mass did Rutherford find was concentrated in the nucleus?

• About 50%
• Less than 90%
• More than 99%
• Exactly 75%

Tags

NGSS.HS-PS1-8

5. What did J.J. Thomson discover?

• The nucleus
• The proton
• The electron
• The neutron

1. What is the primary function of the strong force in an atomic nucleus?

• To hold electrons in their orbitals
• To maintain atomic radius
• To hold protons and neutrons together
• To create electromagnetic fields

Tags

NGSS.HS-PS1-8

2. Which statement best describes the atomic radius?

• The distance between two bonded atoms
• The total distance from nucleus to outermost electron orbital
• The size of the nucleus only
• The distance between electron shells

3. What is the defining characteristic of an element?

• The number of neutrons in its atoms
• The number of protons in its atoms
• The number of electron shells
• The total atomic mass

4. How is the periodic table primarily organized?

• By atomic mass
• By atomic radius
• By atomic number
• By electronegativity

5. What is electronegativity?

• The ability of atoms to lose electrons
• The tendency of atoms to attract shared electrons
• The force between protons
• The energy of electron orbitals