Van der waals forces Study guides, Class notes & Summaries

A pair of shared valence electrons is referred to as a(n): a. covalent bond b. hydrophobic effect c. van der Waals interaction d. ionic bond correct answer: a. covalent bond For an atom that is NOT an ion, which of the following must be TRUE? a. the number of electrons equals the number of protons b. the number of protons equals the number of neutrons c. the number of electrons equals the number of neutrons correct answer: a. the number of electrons equals the number of protons As...

states of matter - three primary states of matter: solid, liquid, and gas Solids - "Solids have a fixed volume and shape. The molecules that make up the solid have the shortest distance to travel until they collide with one another. This motion has been referred to as a "jiggle." Solids have a high degree of internal order; their atoms or molecules are limited to back-and-forth motion about a central position, as if held together by springs (see Figure 6-1, A). Solids maintain their shap...

AS-Level Chemistry :Paper 1 2024 latest update graded a+ Arranged in periods (rows) and groups (columns) by atomic (proton) number - CORRECT ANSWER-How is the periodic table arranged Have the same number of electrons shells, even if they are not all parts of the s or p sub-shells - CORRECT ANSWER-All elements within a period ... Have the same number of electrons in their outer shell, meaning that they all have similar properties - CORRECT ANSWER-All elements within a group ... Periodic...

Bios 1300 Cumulative Final Exam |214| Questions With Complete Solution Which of the following bond types is the weakest? Isotopic bonds Van der Waals forces Hydrogen bonds Ionic bonds Nonpolar covalent bonds Polar covalent bonds ANS-Van der Waals forces The lower the pH of a solution, the ________. lower the H+ concentration more neutral the solution is greater the number of oxygen atoms greater the number of H+ in solution less toxic the solution is ANS-greater the number of H+ i...

Bios 1300 Cumulative Final Exam Fall 2023 with complete solution Which of the following bond types is the weakest? Isotopic bonds Van der Waals forces Hydrogen bonds Ionic bonds Nonpolar covalent bonds Polar covalent bonds Van der Waals forces The lower the pH of a solution, the ________. lower the H+ concentration more neutral the solution is greater the number of oxygen atoms greater the number of H+ in solution less toxic the solution is greater the number of H+ in solution ...

Electronegativity is larger/smaller with a greater number of electron shells. - correct answer smaller Electronegativity is larger/smaller with a greater proton number in a given period (horizontal row). - correct answer larger What is wrong, if anything, with the following statement: "When NaCl is dissolved in water, the water molecules closest to the ions will tend to preferentially orient themselves so that their oxygen atoms can interact electrostatically with the chloride ions...

BTEC Applied Science Unit 1 Chemistry - Distinction. How many electrons can an s subshell hold? correct answer2 How many electrons can a p subshell hold? correct answer6 How many electrons can a d subshell hold? correct answer10 Which subshells are available in the first energy level? correct answers Which subshells are available in the second energy level? correct answers and p Which subshells are available in the third energy level? correct answers, p and d What is Hund's rule? correct ...

The dipole moment in a water molecule Which statement about hydrogen bonds is NOT true? A) Hydrogen bonds account for the anomalously high boiling point of water. B) In liquid water, the average water molecule forms hydrogen bonds with three to four other water molecules. C) Individual hydrogen bonds are much weaker than covalent bonds. D) Individual hydrogen bonds in liquid water exist for many seconds and sometimes for minutes. E) The strength of a hydrogen bond depends on the linearit...

The smallest functional unit in living organisms - ANSWER-Atoms The three subatomic particles - ANSWER-protons, neutrons, electrons Where the neutrons and protons are found - ANSWER-The atomic nucleus What was Rutherford's experiment? - ANSWER-A fine beam of positively charged alpha particles (helium nuclei) was aimed at an extremely thin sheet of gold. A zinc sulphide screen was used to detect any alpha particles that passed through or bounced off. What shape are "s" orbitals? - ...

OCR A Level Chemistry Paper 2 (H432/02) Synthesis and analytical techniques Mark Scheme for June 2023. Trend for all 3 hydrocarbons (1 mark): Boiling point increases with less branching OR less methyl/alkyl groups/side chains  Explanation with comparison (3 marks): Branching and surface contact (Less branching gives) more (surface) contact / interaction (between molecules)  Surface contact and London forces (More surface contact) gives more /stronger induced dipole(–dipole) inte...