Covalent Bonds Incorrect Answer
What best explains whether bromine (Br) or neon (Ne) is more likely to form a covalent bond?
A.) Bromine forms covalent bonds because it has seven valence electrons, but neon has eight valence electrons and already fulfills the octet rule.
The compound ethylene (C2H4) is represented by this diagram. Image--> http://media.edgenuity.com/evresources/3208/3208-04/3208-04-04/3208-04-04-assessment/3208-04-04-12.png What statement best describes the arrangement of the atoms in an ethylene molecule?
A.) Each carbon atom shares two electrons with one hydrogen atom and also shares two electrons with the other carbon atom. --> incorrect answer B.) Each carbon atom shares four electrons with one hydrogen atom and also shares four electrons with the other carbon atom. C.) One electron is shared between each hydrogen atom and the carbon atom bonded to it, and two electrons are shared between the carbon atoms. D.) Two electrons are shared between each hydrogen atom and the carbon atom bonded to it, and four electrons are shared between the carbon atom
Why can a hydrogen atom form a covalent bond without fulfilling the octet rule?
A.) Hydrogen's valence shell can hold only up to two electrons.
What best explains how two oxygen atoms, each with six valence electrons, can bond with each other?
A.) One atom can lose two electrons so that the other atom can gain them and have eight valence electrons.--> Incorrect Answer B.) One atom can lose four electrons to the environment so that a total of eight valence electrons remains. C.) Each atom can share two electrons with the other so that each atom has eight valence electrons. D.) Each atom can lose two electrons so that there is a total of eight valence electrons between the atoms.
For a science fair project about food and chemistry, Bill looks around his kitchen for examples of covalent compounds. What evidence can Bill use in his project to show that water (H2O) acts like other covalent compounds?
B.) He can demonstrate that water can be boiled on a simple kitchen stove.
Which elements can join with other elements to form covalent bonds? Check all that apply.
C I N
Walls made of paraffin wax, a covalent compound, help keep the temperature in a room steady as night changes into day and day into night. What is the most important property of covalent compounds that allows paraffin wax to help keep a room's temperature level?
C.) The wall would absorb extra heat during the day when the sun is out, then release the heat back into the room when the sun goes down.
The element carbon (C) is most likely to form covalent bonds with the element
C.) selenium (Se).
The compound cyanogen (CN)2 has covalent bonds shown in this diagram. Image---> http://media.edgenuity.com/evresources/3208/3208-04/3208-04-04/3208-04-04-assessment/3208-04-04-11.png How many electrons are shared between one nitrogen atom and one carbon atom?
C.) six
Which is most likely a covalent compound?
D.) CF4
In carbon dioxide (CO2), there are two oxygen atoms for each carbon atom. Each oxygen atom forms a double bond with carbon, so the molecule is formed by two double bonds. Two double bonds means that the total number of electrons being shared in the molecule is
D.) eight.
For a science fair project about food and chemistry, Bill looks around his kitchen for examples of covalent compounds. What evidence can Bill use in his project to show that water (H2O) acts like other covalent compounds?
He can demonstrate that water can be boiled on a simple kitchen stove.
In carbon dioxide (CO2), there are two oxygen atoms for each carbon atom. Each oxygen atom forms a double bond with carbon, so the molecule is formed by two double bonds. Two double bonds means that the total number of electrons being shared in the molecule is
NOT 6
Walls made of paraffin wax, a covalent compound, help keep the temperature in a room steady as night changes into day and day into night. What is the most important property of covalent compounds that allows paraffin wax to help keep a room's temperature level?
NOT The wall would not absorb or release any heat energy from the room or outside, so it would not affect the room's temperature.
A candle's wick is the fabric string that holds the flame, and it burns down at a constant slow pace when the candle is lit. The wick is usually surrounded by wax. Which is the most important property of covalent compounds that makes them useful for making candle wax?
a low melting point
Which is most likely a covalent compound? (two non metals, bc ionic compounds are metal and nonmetal)
cf, NH3
Covalent bonds are formed between
nonmetals
The element carbon (C) is most likely to form covalent bonds with the element
selenium
The compound cyanogen (CN)2 has covalent bonds shown in this diagram. How many electrons are shared between one nitrogen atom and one carbon atom?
six
