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Why might two elements possess similar chemical properties? A. They belong to the same group of the periodic table. B. They have the same physical state. C. They have similar physical properties. D. They belong to the same period of the periodic table.

Is vinegar an element, compound, or mixture?

Why is copper nitrate written as Cu(NO3)2 instead of CuNO3 when the valency of copper is +1? Why do we use the (II) valency of copper (+2) only in the formula of copper nitrate?

"Complete the balanced neutralization equation for the reaction below: HCl(aq)+NaOH(aq)→"

What is the formula for selenium tetrafluoride?

"What are the names for the formulas HClO, HClO₂, HClO₃, HClO₄? A. Chloric acid, Chlorous acid, Perchloric acid, Hypochlorous acid B. Hydrochloric acid, Chlorous acid, Perchloric acid, Hypochlorous acid C. Hypochlorous acid, Chloric acid, Chlorous acid, Perchloric acid D. Hypochlorous acid, Perchloric acid, Chloric acid, Chlorous acid"

"The name for Na3N is: A. sodium nitride B. sodium (I) nitride C. trisodium mononitride D. sodium (III) nitride E. trisodium nitride"

Is gasoline an element, compound, heterogeneous mixture, or homogeneous mixture?

What is the oxidation state of Br?

What type of molecule is BCl3? Is it polar or nonpolar?

Is salad (lettuce, tomato, and onion) a pure substance or a mixture?

"Determine the electron geometry (eg) and molecular geometry (mg) of CO32−. A. eg = tetrahedral, mg = trigonal planar B. eg = tetrahedral, mg = tetrahedral C. eg = tetrahedral, mg = trigonal pyramidal D. eg = trigonal planar, mg = trigonal planar E. eg = trigonal planar, mg = bent"

What is the formula for hydrophosphoric acid?

"N₂ is diamagnetic while O₂ is paramagnetic. Explain on the basis of molecular orbital theory. A. The answer cannot be explained by molecular orbital theory. B. N₂ has unpaired electrons, making it diamagnetic. C. O₂ has unpaired electrons, making it diamagnetic. D. N₂ has paired electrons, making it paramagnetic. "

Why is hydroxide written as OH1 - and not OH2?

"Create a Bohr model for a sodium 1+ ion (Na+). Make sure to clearly label the appropriate number of protons, neutrons, and electrons."

"Is silicon a metal, nonmetal, or metalloid? Metal Nonmetal Metalloid"

Question: atom subshell from which electron removed to form +1 cation subshell to which electron added to form -1 anion H 1s 1s Be Rb Xe x 6 ?

How do ionic compounds and molecular compounds behave differently in solution?

"Which best describes the definition of Lewis acids and bases? A. A general definition based on electron structure B. A general definition based on hydrogen ion concentration C. A specific definition based on a compound's ability to accept protons D. A specific definition based on a compound's ability to donate protons"

"How many bonds can a carbon atom form with other atoms? A. three B. six C. four D. two"

What is the difference between the compounds Fe2O3 and FeO? Why are they not both called simply iron oxide?

"How many protons, neutrons, and electrons are present in an atom of gold (Au) with a mass number of 197? A. 197 protons, 276 neutrons, 79 electrons B. 79 protons, 118 neutrons, 79 electrons C. 79 protons, 197 neutrons, 118 electrons D. 118 protons, 72 neutrons, 118 electrons"

"Which type of hybridization leads to a bent molecular geometry and a tetrahedral electron domain geometry? A. sp B. s2p C. s2p2 D. sp3"

"Determine the molecular geometry of the carbonate ion, CO^2−3."

"What is the chemical formula for Iron(III) hydroxide? a. Fe(OH)₂ b. FeOH c. Fe₂OH d. Fe(OH)₃ e. Fe₂(OH)₃"

Is cooking an egg an example of a physical or chemical change?

What is the chemical formula for a compound made of magnesium ions Mg2+ and oxygen ions O2−?

What is the total number of valence electrons in the Lewis structure of XeO4?

Which elements are diatomic?

How many electrons does iodine (I) have?

The atomic number of carbon is 6. How many electrons does it contain in its outer valence shell?

What is the Lewis structure of NCS with minimized formal charges?

Is iron a compound, an element, or a mixture?

How do you determine whether something is a spectator ion?

"A covalent bond is likely to be polar when ________. A. one of the atoms sharing electrons is more electronegative than the other atom B. carbon is one of the two atoms sharing electrons C. the two atoms sharing electrons are equally electronegative D. the two atoms sharing electrons are of the same element"

What is the molecular geometry, or shape, of phosphorus trichloride (PCl₃)?

Write the complete electron configuration of germanium, element 32.

How many valence electrons are in CH4 ?

What is the Bohr model for potassium?