WorksheetsProperties of water & the elements of life (U1 Q2 Review)
Total questions: 20
Worksheet time: 10mins
Organic compounds contain which elements
Nitrogen
Carbon
Hydrogen
Oxygen
What is a functional groups?
Group of elements that only attach to carbs
group of elements that are attached to a hydrocarbon skeleton
group of elements that are attached to water
Group of elements that keep molecules nonpolar
What is the purpose of functional groups?
To change the properties of moleules and participate in chemical reactions
To make molecules polar
To make molecules non-polar
So that hydrocarbons are less unique
Anything that has mass, takes up space and is made up of elements that cannot be broken down into smaller substances is called...
Compounds
Weight
Density
Matter
What type of bond are the lines pointed at?
Non-polar covalent bond
Polar Covalent bond
Hydrogen bond
Ionic Bond
What type of bond is occuring between the Oxygen and Hydrogen atoms?
Non-polar covalent bond
Polar Covalent bond
Hydrogen bond
Ionic Bond
Why can ice float?
The hydrogen bonds keep the molecules structured, forming a crystaline structure, which makes ice less dense than water
The hydrogen bonds keep the molecules structured, forming a crystaline structure, which makes ice more dense than water
The covalent bonds keep the molecules structured, forming a crystaline structure, which makes ice less dense than water
The covalent bonds keep the molecules structured, forming a crystaline structure, which makes ice more dense than water
Identify this functional group
Carboxyl
Hydroxyl
Amino
Methyl
Identify this functional group
Carboxyl
Phosphate
Amino
Methyl
Why does Salt dissolve in water
The sodium (Na) and Chlorine (Cl) dissocaite. Then the negatively charged Na is attracted to hydrogen, and the positively charged Cl is attracted to the oxygen
The sodium (Na) and Chlorine (Cl) dissocaite. Then the negatively charged Na is attracted to oxygen, and the positively charged Cl is attracted to the hydrogen
The sodium (Na) and Chlorine (Cl) dissocaite. Then the positively charged Na is attracted to hydrogen, and the negatively charged Cl is attracted to the oxygen
The sodium (Na) and Chlorine (Cl) dissocaite. Then the positively charged Na is attracted to oxygen, and the negtively charged Cl is attracted to the hydrogen
Why does adhesion occur?
Hydrogen bonds between water molecules and other types of molecules
Hydrogen bonds between the oxygen of one water molecule and a hydrogen of another water molecules
Covalent bonds between water molcules and other types of molecules
Covalent bonds between oxygen of one water molcule and the hydrogen of another water molecule
Carbs, Proteins and Nucleic acids are all made up of
polymers
Monomers
Nitrogen
Non-polar covalent bonds
A dehydration reaction involves...
The addition of a water molecule to break apart 2 monomers
The removal of a water molecule to break apart 2 monmomer
The addition of a water molecule to join 2 monomers
The removal of a water molecule to join 2 monomers
A hydrolysis reaction involves...
The addition of a water molecule to break apart 2 monomers
The removal of a water molecule to break apart 2 monmomer
The addition of a water molecule to join 2 monomers
The removal of a water molecule to join 2 monomers
When will an element no longer create bonds
Once the octet rules is met
Once there an extra electron in its valence shell
Once it creates a hydrogen bond
Once it looses an electron from its valence shell
What elements make up all living things?
Carbon, hydrogen, oxygen, phosphate, nitrogen
Carbon, hydrogen, oxygen, nitrogen
Carbon, hydrogen, oxygen, potassium, nitrogen
Carbon, hydrogen, oxygen, potassium, sodium
Electronegativity...
Increases as you move to the top left of the periodic table, and makes the atom hog electrons
Increases as you move to the bottom left of the periodic table, and makes the atom hog electrons
Increases as you move to the bottom right of the periodic table, and makes the atom hog electrons
Increases as you move to the top right of the periodic table, and makes the atom hog electrons
What property is occuring when a top layer of water molecules are being drawn downward by hydrogen bonds from the water molecules below them?
Evaporative cooling
Surface tension
Cohesion
Capillary action
This is a...
Lewis dot structure
Bohr model
What property is occuring when adhesion is stronger than cohesion?
Evaporative cooling
Surface tension
Density
Capillary action
