Regents Review #6

Which group on the Periodic Table of the Elements contains elements that react with oxygen to form compounds with the general formula X2O? (1) Group 1 (2) Group 2 (3) Group 14 (4) Group 18

Which compound contains only covalent bonds? (1) NaOH (2) Ba(OH)2 (3) Ca(OH)2 (4) CH3OH

Which type of bond results when one or more valence electrons are transferred from one atom to another? A. a hydrogen bond B. an ionic bond C. a nonpolar covalent bond D. a polar covalent bond

Which substance contains bonds that involved the transfer of electrons from one atom to another? 1. CO₂ 2. NH₃ 3.KBr 4.Cl₂

Which formula represents a molecular substance? A)CaO B)Al2O3 C)Li2O D)CO

Which type of bond is ofund in one molecule of methane, CH4? a. a covalent bond b.a hydrogen bond c.an ionic bond d. a metallic bond

A neutral atom with the electron configuration 2-6 would most likely form a bond with an atom having the configuration A. 2 B. 2-2 C. 2-8 D. 2-8-8

Every water molecule has two hydrogen atoms bonded to one oxygen atom. This fact supports the concept that elements in a compound are (1) chemically combined in a fixed proportion (2) chemically combined in proportions that vary (3) physically mixed in a fixed proportion (4) physically mixed in proportions that vary

what is the chemical formula of iron(III) oxide? A. FeO B. Fe3O2 C. Fe2O3 D. Fe3O

Which compound contains ionic bonds? A. NO2 B. CO2 C. NO D. CaO

which element forms an ionic compound when it reacts with lithium? (1) K (2) Fe (3) Kr (4) Br

Which formula represents an ionic compound? 1. H2 2. CH4 3. CH3OH 4. NH4Cl

Element X is in group 2 and element Y is in group 17.What happens when a compound is formed between these two atoms? A. X loses electrons to Y to form an ionic bond. B. X loses electrons to Y to form a covalent bond. C. X gains electrons from Y to form an ionic bond. D. X gains electrons from Y to form a covalent bond

the compound XCl is classified as ionic if X represents the element A. I B. Br C. Rb D. H

An ionic compound is formed when there is a reaction between the elements a) strontium and chlorine b)hydrogen and chlorine c)nitrogen and oxygen d)sulfur and oxygen

Which formula represents an ionic compound? A. HCI B. NaCI C. H2O D. N2O

Which compound has both ionic and covalent bonding? (a) CaCO3 (b)CH2Cl2 (c)CH3OH (d)C6H12O6

Which compound contains both ionic and covalent bonds? A. HCI(g) B. NH4CI(s) C. NaCl(s) D. CCI4

Which formula represents an ionic compound? A. NaCI B. N2O C. HCI D. H2O

Which kind of compound generally results when nonmetal atoms chemically combine with metal atoms? A. Ionic B. Covalent C. Metallic D. Hydrogen

The bonds in BaO are best described as A) Covalent, because valence electrons are shared B) Covalent, because valence electrons are transferred C) Ionic, because valence electrons are shared D) Ionic, because valence electrons are transferred

The bond between Br atoms in a Br2 molecule is A. ionic and is formed by the sharing of two valence electrons B. ionic and is formed by the transfer of two valence electrons C. covalent and is formed by the sharing of two valence electrons D. covalent and is formed by the transfer of two valence electrons

In which compound do atoms form bonds by sharing electrons? 1- H2O 2-CaO 3-Na2O 4-MgO

Which statement best describes the substance that results when electrons are transferred from a metal to a nonmetal? 1. It contains ionic bonds and has a low melting point. 2. It contains ionic bonds and has a high melting point. 3. It contains covalent bonds and has a low melting point. 4. It contains covalent bonds and has a high melting point.

Covalent bonds are formed when electrons are A. Mobile within a metal B. Transferred from one atom to another C. Captured by the nucleus D. shared between two atoms

Element X reacts with iron to form two different compounds with the formulas FeX and Fe2X3. To which group on the Periodic Table does element X belong? (1) Group 8 (3) Group 13 (2) Group 2 (4) Group 16

Which type of bonding is found in all molecular substances? 1. covalent bonding 2. hydrogen bonding 3. ionic bonding 4. metallic bonding

Which atoms are most likely to form covalent bonds? A. metal atoms that share protons B. nonmetals that share protons C. nonmetal atoms that share electrons D. metal atoms that share electrons

Which compound contains only covalent bonds? NaOH Ba(OH)2 Ca(OH)2 CH3OH