chemistry

A characteristic of ionic solids is that they... A. have high melting points B. have low boiling points C. conduct electricity D. are noncrystalline

A

A white crystalline salt conducts electricity when it is melted and when it is dissolved in water. Which type of bond does this salt contain? A. ionic B. metallic C. covalent D. network

A

On the periodic table of the elements, all the elements within Group VIA have the same number of... A. valence electrons B. energy levels C. protons D. neutrons

A

The bonds present in silicon carbide (SiC) are... A. covalent B. ionic C. metallic D. van der Waals

A

What is the correct formula of potassium hydride? A. KH B. KH2 C. KOH D. K(OH)2

A

Which compound contains ionic bonds? A. NaBr(s) B. HBr(g) C. C6H12O6(s) D. CO2(g)

A

Which pair of elements form an ionic bond with each other? A. KCl B. ICl C. PCl D. HCl

A

which type of bonding is found in all molecular substances? A. covalent bonding B. hydrogen bonding C. ionic bonding D. metallic bonding

A

In which group do the elements usually form chlorides which have the general formula MC2? A. IA B. IIA C. VIIA D. O

B

The symbol = represents... A. one pair of shared electrons B. two pairs of shared electrons C. a single covalent bond D. a coordinate covalent bond

B

What is the correct name for the compound with the formula CrPO4 A. chromium (II) phosphate B. chromium (III) phosphate C. chromium (II) phosphide D. chromium (II) phosphide

B

Which compound contains both covalent and ionic bonds? A. KCl B. NH4Cl C. MgCl2 D. CCl4

B

Which pair of atoms will share electrons when a bond is formed between them? A. Ba and I B Br and Cl C. K and Cl D. Li and I

B

Which type of bond if formed between the two chlorine atoms in a chlorine molecule?

B

The correct electron dot formula for hydrogen chloride is... A. H:Cl B. (8 dots around H) H Cl C. H (8 dots around Cl) Cl D. :H Cl (6 dots around Cl)

C

What is represented by the dots in a Lewis electron-dot diagram of an atom of an element in period 2 of the periodic table? A. the number of neutrons in the atom B. the number of protons in the atom C. the number of valence electrons in an atom D. the total number of electrons in the atom

C

Which is the electron dot symbol for a chlorine atom in the ground state? A. Cl (8 dots around) B. Cl (2 dots around) C. Cl (7 dots around) D. Cl ( dots around)

C

Which substance contains positive ions immersed in a sea of mobile electrons? A. O2(s) B. SiO2(s) C. Cu(s) D. CuO(s)

C

The correct formula for sodium oxide is... A. SO2 B. S2O C. NaO2 D. Na2O

D

What is the maximum number of covalent bonds that a carbon atom can form? A. 1 B. 2 C. 3 D. 4

D

When a metal atom combines with a nonmetal atom, the nonmetal atom will... A. lose electrons and decrease in size B. lose electrons and increase in size C. gain electrons and decrease in size D. gain electrons and increase in size

D

Which atom listed has the greatest ability to attract the electrons that form a bond between it and another atom? A. sodium B. magnesium C. aluminum D. chlorine

D

Which type of bond is formed by the transfer of electrons from one atom to another? A. covalent bond B. a coordinate covalent bond C. a hydrogen bond D. an ionic bond

D

a solid substance is an excellent conductor of electricity. The chemical bonds in this substance are most likely... A. ionic, because the valence electrons are scared between atoms B. ionic, because the valence electrons are mobil C. metallic,because the valence electrons are stationary D. metallic, because the valence electrons are mobile

D