Electron dot diagram - Study guides, Class notes & Summaries

Unit 3 Honors Chemistry Graded A+ Ionic Bond: ️ When nonmetals and metals bond together to create a charge. Covalent Bond: ️ When two or more nonmetals SHARE electrons between each other (e.g., Fluorine 7 and Fluorine 7). Metallic Bonding: ️ Metals lose electrons or they roam freely throughout the metal to create a cation. Octet Rule: ️ An atom must have 8 valence electrons to be completely stable, like the noble gases. Lewis Dot Symbol: ️ A diagram that...

What does 'aq' mean? - answer Aqueous - it is dissolved in water Water - formula - answer H20 Ammonia - formula - answer NH3 Carbon Dioxide - formula - answer CO2 Hydrogen - formula - answer H2 Chlorine - formula - answer Cl2 Oxygen - formula - answer O2 Ammonium (ion) - formula - answer NH4 (+) Hydroxide (ion) - formula - answer OH (-) Nitrate (ion) - formula - answer NO3 (-) Carbonate (ion) - formula - answer CO3 (2-) Sulfate (ion) - formula - answer SO4 (2-) What do you leav...

Gizmo Questions and Answers 100% Pass Which number is equal to the number of protons in the atom? Atomic Number No charge at all? Neutrons (n0) Negative Charge? Electrons (e-) Radioactive? The atoms decay over time and emit radiation. Which isotope, Li-6 or Li-7 is the most common isotope of Lithium? Li-7 Isotope? An Element has the same number of protons, but different numbers of neutrons. What is a nucleus? The center of the atom. What does Li Mean? Lithium What is a atom? Tiny particl...

Chapter 1 Carbon and Its Compounds CHECKPOINT PROBLEMS Practice Problem 1.1 a) S — 1s2 2s2 2p6 3s2 3p4 b) Cl — 1s2 2s2 2p6 3s2 3p5 c) Na+ — 1s2 2s2 2p6 1-2 Copyright © 2018 Nelson Education Limited Practice Problem 1.2 a) Count valence electrons. Build a basic bonding framework and account for electrons used. Add remaining electrons and check for formal charges. The molecule has a lone pair on the nitrogen. All other electrons are bonding electrons. b) Count valence electrons. Build a bas...

Covalent Bonds Exam Questions and Answers All Correct Covalent bond - Answer-The chemical bond formed when two atoms share electrons What atoms usually form covalent bonds? - Answer-Nonmetal atoms. Ionic bonds usually form between metal and nonmetal atoms. Describe how nonmetals bond. - Answer-They bond by sharing electrons. Atoms of some nonmetal elements can bond with each other. Two fluorine atoms can react by sharing a pair of electrons. By sharing electrons, each fluorine atom has...

AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/1F Foundation Tier Chemistry Paper 1F Question Paper + Mark scheme [MERGED] June 2022 *junc1f01* IB/M/Jun22/E9 8464/C/1F For Examiner’s Use Question Mark 1 2 3 4 5 6 7 TOTAL Time allowed: 1 hour 15 minutes Materials For this paper you must have: • a ruler • a scientific calculator • the periodic table (enclosed). Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • F...

MULTIPLE CHOICE QUESTIONS Topic: Atomic Orbitals 1. In quantum mechanics a node (nodal surface or plane) is: A) a place where Ψ is negative. B) a place where Ψ is positive. C) a place where Ψ = 0. D) a place where Ψ2 is large. E) a place where Ψ2 is negative. Ans: C Topic: Atomic Orbitals, Molecular Orbitals 2. When the 1s orbitals of two hydrogen atoms combine to form a hydrogen molecule, how many molecular orbitals are formed? A) 1 B) 2 C) 3 D) 4 E) 5 Ans: B Topic: A...

Chapter 1 Carbon and Its Compounds CHECKPOINT PROBLEMS Practice Problem 1.1 a) S — 1s2 2s2 2p6 3s2 3p4 b) Cl — 1s2 2s2 2p6 3s2 3p5 c) Na+ — 1s2 2s2 2p6 1-2 Copyright © 2018 Nelson Education Limited Practice Problem 1.2 a) Count valence electrons. Build a basic bonding framework and account for electrons used. Add remaining electrons and check for formal charges. The molecule has a lone pair on the nitrogen. All other electrons are bonding electrons. b) Count valence electrons. Build a bas...

ATOM (physics and chemistry) the smallest component of an element having the chemical properties of the element MATTER Anything that has mass and occupies space. SUBSTANCE Any material all samples of which have the same composition and properties ( a mixture is not a substance) ELEMENT Identified by its symbol and its atomic number ATOMIC NUMBER Number of protons in the nucleus of an atom MASS NUMBER Sum of the number of protons and neutrons in the nucl...

Element Builder- Gizmos Latest 2023 100% Pass What are elements Pure substances that are made up of one kind of atom What are atoms Tiny particles of matter that are made up of three particles: protons, neutrons, and electrons Where is the proton located In the center of the atom, called the nucleus Which particles are located in the nucleus Protons and neutrons Which particles orbit around the nucleus Electrons What causes the element name to change The number of protons that you add How ...