Science 9 - Matter

Which scientist proposed the quantum mechanical model of the atom?

• Niels Bohr

• JJ Thomson

• Ernest Rutherford

• Erwin Schrödinger

According to Bohr's atomic model, electrons occupy specific energy levels called:

• Orbitals

• Shells

• Nuclei

• Valence levels

Rutherford's atomic model proposed that atoms have a dense, positively - charged center called the:

• Electron cloud

• Proton

• Nucleus

• Neutron

Which atomic model describes the atom as a positively charged sphere with electrons scattered throughout?

• Quantum mechanical model

• Rutherford's atomic model

• JJ Thomson's atomic model

• Bohr's atomic model

The electron configuration of an atom refers to:

• The arrangement of electrons in the atom's nucleus

• The total number of electrons in the atom

• The distribution of electrons in the atom's energy levels

• The number of valence electrons in the atom

Which type of bond involves the complete transfer of electrons from one atom to another?

• Ionic bond

• Metallic bond

• Covalent bond

• Hydrogen bond

What is the correct binary nomenclature for the compound CaCl?

• Calcium dichloride

• Calcium trichloride

• Calcium chloride

• Calcium chlorate

Which type of bond involves the sharing of electrons between atoms?

• Ionic bond

• Metallic bond

• Covalent bond

• Hydrogen bond

Which of the following properties is NOT typically associated with ionic compounds?

• High melting and boiling points

• Conductivity in the solid state

• Brittle crystalline structure

• Sharing of electrons between atoms

What is the correct binary nomenclature for the compound Na O?

• Sodium oxalate

• Sodium peroxide

• Sodium oxide

• Sodium monoxide