SUMMATIVE TEST IN GEN CHEM 1

Which quantum number indicates the main energy level occupied by an electron?

• Magnetic quantum number

• Azimuthal quantum number

• Principal quantum number

• Spin quantum number

Who proposed that electrons move in fixed energy levels around the nucleus?

• Dalton

• Thomson

• Bohr

• Schrödinger

What type of atom is weakly repelled by a magnetic field?

• Diamagnetic

• Paramagnetic

• Ferromagnetic

• Antimagnetic

Which principle states that electrons occupy the lowest energy orbital first?

• Hund’s Rule

• Aufbau Principle

• Pauli Exclusion Principle

• Bohr’s Postulate

What do the dots in a Lewis symbol represent?

• Neutrons

• Valence electrons

• Protons

• Core electrons

The octet rule states that atoms tend to have how many electrons in their outer shell?

• 2

• 4

• 6

• 8

Which type of bond is formed by the sharing of electrons?

• Ionic

• Metallic

• Covalent

• Hydrogen

In a Lewis structure, a single line between two atoms represents:

• A double bond

• A single covalent bond

• A lone pair

• An ionic interaction

What is the molecular geometry of carbon dioxide (CO₂)?

• Linear

• Bent

• Trigonal planar

• Tetrahedral

What determines whether a molecule is polar or nonpolar?

• Bond length

• Electron affinity

• Molecular shape and electronegativity difference

• Atomic number