Science Quiz

By measuring ratios, chemists established a table of masses based around which unit?

• Atomic Numbers

• Atomic Masses

• Mass Numbers

• Valence Electrons

• Atomic Radiuses

In what state of matter must a substance be in in order to be used in an airport mass spectrometer?

• solid

• liquid

• gas

• plasma

• isotope

Which two major contributors to chemistry did John Dalton's research draw from?

• Antoine Lavoisier and Joseph Louis Proust

• Carl Wilhelm Scheele and Joseph Black

• Rosalind Franklin and James Watson

• Amedeo Avogadro and Joseph Priestly

• Johannes Bronsted and Thomas Lowry

The position of elements in the periodic table depends on what?

• Atomic Mass Unit

• Size of electron cloud

• Variations in orbital structure

• Number of valence electrons

• Electron orbitals present

What term is applied to an atom as a measure of the fact that most neutral atoms still exhibit a small attraction for an eletron?

• Ionization Energy

• Electron Affinity

• Atomic Radius

• Electrostatic Force

• Valence

When are metallic bonds formed?

• When two atoms share a pair of electrons

• When one or more electrons transfer from one atom to another, forming a positive and negative ion

• When atoms, generally of the same element, are bonded in such a way as to allow many electrons to move more freely among the atoms

• When atoms of elements cluster together in arrangements that only break apart if energy is applied

• When the force of attraction between positive and negative charges bonds atoms

Who established the model of DNA based on X-Ray studies of DNA?

• Rosalind Franklin and Maurice Wilkins

• Joseph Black and Joseph Priestly

• Johannes Bronsted and Thomas Lowry

• James Watson and Francis Crick

• Robert Boyle and Henry Cavendish

Which chemist was able to identify hydrogen as an element distinct from other gases and described its properties in great detail?

• Henry Cavendish

• Paracelsus

• Robert Boyle

• Antoine Lavoisier

• Niels Bohr

In a solid, molecules are not moving over long distances, a type of motion called which of the following?

• Vibrational motion

• Rotational motion

• Circular motion

• Translational motion

• Linear motion

What does a Lewis Structure depict?

• Isotope nuclei

• Atomic particles

• Covalent networks

• Orbital hybridizations

• Valence electrons