Attraction and repulsion - Study guides, Study notes & Summaries

What does the acronym ESD stand for? - ️️Electrostatic Discharge Current amount between ____ and _____ can be lethal. - ️️100mA,200mA What is the number one concern in regards to electrical safety? - ️️Shock Bohr's Atomic Model consists of what three components? - ️️Protons, neutrons and electrons Electrons are arranged in _____ around a nucleus. - ️️Shells What are three types of materials used in electronics? - ️️Conductors, semi-conductors and insulator...

AQA 2023 AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry questions and answers verified What is the equation linking mass moles and MR? Mass=moles * MR What is the definition of Ar (relative atomic mass)? The average mass of an atom of an element compared to the mass of one twelfth of carbon 12. What does Mr stand for? Relative molecular mass Define relative isotopic mass. The mass of an isotope of an element compared to the mass of one twelfth of the mass of carbon 12 ...

Inorganic Chemistry 2 Exam Review With 100% Correct Answers 2024 1) Which of the following statements about gases is false? A) All gases are colorless and odorless at room temperature. B) Distances between molecules of gas are very large compared to bond distances within molecules. C) Gases expand spontaneously to fill the container they are placed in. D) Gases are highly compressible. E) Non-reacting gas mixtures are homogeneous. - answerA) All gases are colorless and odorless at room ...

CETA PRACTICE TEST QUESTIONS AND CORRECT ANSWERS AND RATIONALES|ALREADY GRADED A| What does the acronym ESD stand for? A. Electrostatic Discharge B. Electrostatic Device C. Electromagnetic Sensitivity Diac D. Electrostatic Damage - ANSWER- A. Electrostatic Discharge Current amounts between ______ and _____ can be lethal. A. 100mA, 200mA B. 10mA, 33.3mA C. 33.3, 75.6mA D. 4mA, 10mA - ANSWER- A. 100mA, 200mA What is the number one concern in regards to electrical safety? ...

CETa Practice Test Questions With Verified Solutions 1. What does the acronym ESD stand for? A. Electrostatic Discharge B. Electrostatic Device C. Electromagnetic Sensitivity Diac D. Electrostatic Damage - answerA. Electrostatic Discharge Current amounts between ______ and _____ can be lethal. A. 100mA, 200mA B. 10mA, 33.3mA C. 33.3, 75.6mA D. 4mA, 10mA - answerA. 100mA, 200mA What is the number one concern in regards to electrical safety? A. Proper grounding B. ESD C...

Which reaction requires the most energy? A. N(g) → N+(g) + e - B. N+(g) → N2+(g) + e - C. F(g) → F+(g) + e - D. F+(g) → F2+(g) + e - - D. F+(g) → F2+(g) + e - Fluorine has a higher effective nuclear charge than Nitrogen - so it is harder to remove an electron (takes more energy because the electron is more strongly attracted by the nucleus). Effective nuclear charge is the same for F and F+ because the number of protons and core electrons are not changed. However, when the numb...

Chemistry AQA AS EXAM 2024 QUESTIONS WITH 100% CORRECT ANSWERS Mass number - ANSWERS Total number of protons and neutrons. Atomic number - ANSWERS Numbers of protons in the nucleus and number of electrons in shells. Negative Ions - ANSWERS More electrons than protons. Positive ions - ANSWERS More protons than electrons. Relative isotopic mass - ANSWERS mass of an atom of an isotope of an element on a scale where an atom of carbon12 is 12. Relative atomic mass - ANSWERS average mass o...

Which reaction requires the most energy? A. N(g) → N+(g) + e - B. N+(g) → N2+(g) + e - C. F(g) → F+(g) + e - D. F+(g) → F2+(g) + e - - Answer-D. F+(g) → F2+(g) + e - Fluorine has a higher effective nuclear charge than Nitrogen - so it is harder to remove an electron (takes more energy because the electron is more strongly attracted by the nucleus). Effective nuclear charge is the same for F and F+ because the number of protons and core electrons are not changed. However, when t...

In the compound [ICl2]+ [SbCl6]-, the oxidation number of chlorine is -1. What are the oxidation numbers of I and Sb in the compound? I Sb A +1 +5 B +1 +7 C +3 +5 D +3 +7 - ANSWER C Which statement best explains why nitrogen has a larger first ionisation energy than oxygen? A N atoms have less repulsion between p-orbital electrons than O atoms. B N atoms have a smaller nuclear charge than O atoms. C N atoms lose an electron from the 2s subshell, while O atoms lose an electron from th...

CETA Practice Test REAL EXAM QUESTIONS WITH VERIFIED CORRECT ANSWERS 1. What does the acronym ESD stand for? A. Electrostatic Discharge B. Electrostatic Device C. Electromagnetic Sensitivity Diac D. Electrostatic Damage - ANSWER A. Electrostatic Discharge 2.Current amounts between ______ and _____ can be lethal. A. 100mA, 200mA B. 10mA, 33.3mA C. 33.3, 75.6mA D. 4mA, 10mA - ANSWER A. 100mA, 200mA 3. What is the number one concern in regards to electrical safety? A. Prope...