Science quiz Leslie

What is the most widely accepted explanation for the origin of the universe?

• Stellar Nucleosynthesis

• Supernova Nucleosynthesis

• Formation of light elements

• The Big Bang

What are the atoms of an element that have the same number of protons but different numbers of neutrons called?

• Electronegativity

• Isotopes

• Valence Electron

• Nucleosynthesis

Who proposed that all matter is made up of very small particles called atoms?

• Wilhelm Roentgen

• Dmitri Mendeleev

• John Joseph Dalton

• Aristotle

What is the measure of the tendency of an atom to attract electrons itself?

• Electronegativity

• Electronic Configuration

• Valence Electron

• Bohrs Model

What type of bond is formed by the complete transfer of valence electrons between atoms?

• Covalent bond

• Dipole-dipole interactions

• Metallic bonding

• Ionic bond

What is the special kind of dipole-dipole interaction that occurs specifically between a hydrogen atom bonded to either an oxygen, nitrogen, or fluorine atom?

• Hydrogen bonding

• London dispersion forces

• Polar covalent bond

• Nonpolar covalent bond

What is the bond between atoms whose difference in electronegativities is less than 0.5 called?

• Ionic bond

• Nonpolar covalent bond

• Metallic bonding

• Polar covalent bond

Who discovered X-rays?

• John Joseph Thomson

• Ernest Rutherford

• James Chadwick

• Wilhelm Roentgen

What is the atomic model that shows electrons move in concentric orbits around the nucleus called?

• Valence Electron

• Electronic Configuration

• Lewis dot Symbols

• Bohrs Model

What is the attraction between two or more molecules called?

• Dipole-dipole interactions

• Hydrogen bonding

• Intermolecular force

• Intramolecular force