Electron affinity - Study guides, Class notes & Summaries

CHEM 111 Exam 2|53 Questions with Verified Answers Name the three periodic trends. - CORRECT ANSWER ionization energy, electron affinity, atomic radius Write a sample equation for the first ionization energy of magnesium. - CORRECT ANSWER Mg → Mg⁺ + e⁻ Which electrons are bound more tightly: core or valence? - CORRECT ANSWER core What is the general trend in first ionization energy across a period? - CORRECT ANSWER increases from left to right What is the general trend in fi...

AQA A LEVEL BIOLOGY Paper 1 2024 What is the function of the cell membrane? - ANS To control what enters and leaves the cell, acts as a barrier between the cell and its environment. What structural feature of the cell membrane allows substances to enter/leave? - ANS Partially permeable What is the fluid mosaic model? - ANS States that a membrane is a fluid structure (because phospholipids are constantly moving) with a "mosaic" of various proteins embedded in it Describe t...

Which of the following properties or processes do we associate with living things? A) evolutionary adaptations B) energy processing C) responding to the environment D) growth and reproduction E) all of the above - Answer-e The lowest level of biological organization that can perform all the activities required for life is the A) organelle-for example, a chloroplast. B) cell-for example, a skin cell. C) tissue-for example, nervous tissue. D) organ system-for example, the reproductive s...

ACS Chemistry Final Exam 182 Questions with Verified Answers Layout of an element (mass # & atomic #) - CORRECT ANSWER atomic number = - CORRECT ANSWER # of protons mass number = - CORRECT ANSWER # of protons + neutrons the number of protons in a neutral atom will equal the - CORRECT ANSWER # of electrons how to find the correct number of neutrons - CORRECT ANSWER mass number - atomic number Forms of the same elements that differ in amount of neutrons - CORRECT ANSWER isotopes...

Standard enthalpy of formation ֎ -:- The enthalpy change when one mole of a compound is formed from its elements under standard conditions, with all substances in their standard states. Standard change of atomisation ֎ -:- The enthalpy change when one mole of gaseous atoms is formed from the element in its standard state under standard conditions. First ionisation energy ֎ -:- The enthalpy change needed to remove one electron from each atom in one mole of gaseous atoms to form on...

Endothermic reaction - correct answer To break bonds, the surroundings need to give energy to the molecule. The bonds gains energy, as they take in energy so have a positive sign. The system loses energy so gets colder Exothermic reaction - correct answer To make bonds, the molecule give energy to the surroundings. The bonds lose energy, as they give out energy so have a negative sign. The system gains...

AP Chemistry Exam Review: Physical Chemistry with Answers atomic radius - Answer>> distance from the nucleus to the "edge" of an atom, expressed in nm ionization energy - Answer>> the energy required to remove one electron from a neutral atom of an element electron affinity - Answer>> Energy released when an atom or ion in the gaseous state gains an electron. Increases from left to right and from bottom to top on the Periodic Table.

General Chemistry ACS EXAM Review 168 Questions with Verified Answers Rutherford's Gold Foil Experiment - CORRECT ANSWER proposed that atoms consist of a tiny, massive, positive nucleus surrounded by electrons nucleus - CORRECT ANSWER contains all the positive charge and nearly all the mass of the atom James Chadwick - CORRECT ANSWER discovered the neutron cathode rays - CORRECT ANSWER move from negative electrode to positive electrode (like electrons in a voltaic cell) Thompson...

Isotopes - Same # protons, different # of neutrons 10 5 B (Mass #/Atomic Mass) - p=5 N=10-5=5 e=5 Orbital diagrams - n=# in orbital diagram l: s=0 p=1 d=2 f=3 Ml= timeline w/ 0 Spin: always +1/2 and -1/2 energies affecting atomic orbitals - nuclear charge shielding (reduced full nuclear charge to Zeff) Atomic radus - decreases b/c INCREASED electrostatic attraction Electron affinity - -the energy change when an electron is accepted by atom in gases state (anion formed) -smaller ele...

IB chemistry HL Latest Version Graded A+ exothermic reaction heat is released by the system ΔΗ<0 endothermic reaction heat is absorbed by the system ΔΗ>0 standard enthalpy change of reaction(ΔΗ) the heat energy transferred under standard conditions (pressure-101.3 kPa, temperature- 298 K) combustion and neutralization are exothermic processes average bond enthalpy the energy required to break one mole of a certain type of bond in the gaseous state averaged acro...