test review

use VSEPR theory to predict a bond angles in a molecule of methane (CH4). Which is a covalently bonded molecule

109.5

in a molecule of nitrogen, the two nitrogen atoms are joined by triple covalent bond. How many dots represent this bond in the electron dot formula for the molecule?

6

carbon dioxide shows how electrons are shared between carbon and oxygen. What combination of bonded and non-bonded electrons is represented accurately for this structure?

8 bonded and 8 non-bonded

each sulfur atom forms a double bond with the carbon atom on CS2. What is the three dimensional shape of a CS2 molecule?

linear

what information does a molecular formula provide?

the arrangements of the bonds in the molecule

which set of elements violate the octet rule?

Be, B, S, P, Xe

what are the only element that can exist as double or triple bonds?

C, N, O, P, S

tetrahedral

CH4, SO3-, Co4

Which molecule has a single covalent bond?

Cl2

Which is covanlently bonded molecule?

IOS6

what is molecular formula of a diatomic molecule

N2

which molecule has a pyramidal shape?

ammonia (NH3)

which choice describes the electron dot formula for the molecular compound HCl?

by chemical symbols H and Cl connected by a pair of dots and six additional dots around Cl

a type of spider called a (H20) spider can sit on the surface of the water

hydrogen bonding provides a source that holds water molecules together

which element can A represent?

hydrogen only

a water molecule (H2O) has a bent shape. Which other molecule has a bent shape?

hydrogen sulfate (H2S)

according to (VSEPR) theory which statement is correct?

if a molecule is bent, it will always have unpaired electrons around the central atom

what kinds of information does a structural reveal about a molecular compound?

the arrangement of atoms and bonds

which is incorrect about this formula

there are too many electrons between the nitrogen atom and one of the hydrogen atoms

in a water molecule (H2O), the oxygen atom has two unshared pairs of electrons and two bonding pairs of electrons. How do the unshared pair affect the bond angle?

they push the bonding pairs closer together making the bond angle smaller or bent

what do scientists use for VSEPR for?

to predict the three-dimensional shapes of molecules

in the molecule CO3 predict the geometric shape of this ion

trigonal planar

why can water be used to dissolve many different substances?

water is very polar

when are two atom likely to form a double bong between them?

when sharing two pairs of electrons allows each atom to attain a noble gas electron config

what properties of water explain capillary action?

while the water molecules are attracted the molecules in the sponge, they are also strong hydrogen bonds