WorksheetsBiology- Chapters 2-6
Total questions: 45
Worksheet time: 33mins
What is the maximum amount of electrons the outer-most orbital may hold?
7 electrons
2 electrons
8 electrons
10 electrons
What is the maximum amount of electrons the second orbital can hold?
8 electrons
5 electrons
2 electrons
1 electrons
What is water considered in chemistry and biology?
Solution
Mixture
Compound
Solvant
What is a solvant?
A substance with an ability to dissolve something.
A solution with strong chemical properties.
A solution with weak chemical properties.
A mixture
What is a compound that minimizes changes in PH?
Solvants
Buffers
Benzine
Nucleic acid
What kind of charge does a hydrogen atom typically possess?
Partial negative charge
Neutral charge
Partial positive charge
No charge at all
What is an important quality of water?
Its ability to form hydrogen bonds
It can dissolve solutes
It can be boiled
It is very dense
What is an element?
There are no such thing as elements
A singular physical property
Has its own unique atomic number and is represented on the periodic table
A mix of two elements
What are molecules?
A group of atoms held together by bonds.
A protein
A carbohydrate
A lipid
What is an example of a molecule?
O
N
H2O
H
What is a compound?
Only one type of element
A mix of two substances
A combination of molecules and elements
When more than one type of element is present
Choose an example of a compound
N
H2O
H3
O6
What is an atom?
Largest unit of matter
Smallest living thing on earth
Smallest unit of matter
A cell
What is a chemical reaction?
Burning of a substance
An explosion
Bubbles forming inside a beaker
Forming and breaking of chemical bonds
Is a polar or non polar bond stronger?
Non polar
Hydrogen
Polar
Covalent
What is a non polar bond?
A bond when no electrons are shared
When 2 atoms equally share electrons (do not confuse with covalent bonding)
When the atoms do not bond
A bond when they share a pair of electrons
What is an ionic bond?
When they share electrons
When no electrons are shared
When all electrons are shared
When there is a transfer of electrons from one atom to another
Write out the 4 main elements found largely in the human body
(a)
What is a valence electron?
An electron with no charge
An electron found on the outermost orbital of an atom
An electron with all negative charge
An electron with all positive charge
What is ionization?
Process by which an atom acquires a negative or positive charge by gaining or loosing an electron
The loosing or gaining of an electron
Process of sharing electrons
Transfer of electrons to other atoms
What is the maximum number of electrons the most inner orbital can hold?
8
2
5
7
What is a covalent bond?
A bond in which one pair of electrons is shared
Where two single electrons are transferred to another atom
Where one atom is transferred to another atom
When a pair of electrons is shared between two atoms
What is an example of an ionic bond?
H2O
Na+Cl-
NH2
N10
The number of protons in an element is depicted by what?
Subtracting the atomic number from the atomic mass
Its atomic mass
Element symbol
atomic number
What occurs when there is a change in the atomic number?
It is no longer the same element
It means two elements have combined into one
The element is the same
The element has lost an electron
What is an isotope?
A different version of the same element
Atoms that were once bonded but are no longer
Element that has the same number of protons but different number of neurtrons
No such thing
What are the two main types of bond?
Ionic and covalent
Polar and non polar
Non polar covalent bond
Polar ionic bond
What type of charge does an anion possess?
Neutral charge
Negative (-) charge
No charges exist
Positive (+) charge
Is a covalent bond or an ionic bond stronger?
Polar bond
Ionic bond
Non polar bond
Covalent bond
What is a polar covalent bond?
A bond that all electrons are shared equally
There is no such thing
A bond that the sharing of electrons is not equal. One atom is more electronegative and "pulls" harder than the other
A bond where electron pairs are shared unequally
What kind of charge does a caion possess?
Negative (-) charge
Neutral charge
Positive (+) charge
No charge exists
How can we break down covalent bonds further?
Covalent and Ionic bonds
Non polar and Polar bonds
Ionic bonds and Polar bonds
Ionic bonds and Polar bonds
What type of charge does an oxygen atom have?
Partially negative charge
Partially neutral charge
Partially positive charge
No charge exists
When is an atom most stable?
When there are no electrons
When the valence shell is full
When there are 2 electrons
When there are 5 electrons
What does an atom consist of?
Nucleus only
Protons, Neutrons, and electrons
Protons only
Electrons only
What type of charge does a proton have?
Neutral charge
Positive charge
No charge at all
Half +, Half -
What does the valence number indicate?
Bonded electrons
Non-bonded electrons
The number of unpaired and chemically un-bonded valence electrons
Does not have significance in biology or chemistry
What is the Octet Rule?
There is not limit to how many electrons there can be in the valence shell
Valence shell electrons are insignificant
Simply, the outermost shell may only carry a max of 8 valence electrons
That each orbital may carry 8 electrons
What is a solute?
Substance that does not dissolve in a solvant
Is just water
Has no real use
A substance that dissolves in a solvant
What does it mean when something is hydrophilic?
It interacts with sodium
It interacts with water
It does not interact with water
It interacts with calcium
What does it mean when something is hydrophobic?
It does not interact with heat
It does not interact with water
It does interact with water
It interacts with heat
What type of molecule does not dissolve in water?
Polar
Ionic
Non polar
Covalent
What is adhesion?
The infusion of two substances
An attraction between different molecules for other molecules of the same kind
The combination of 2 substances
Has no significance
What is cohesion?
Water is attracted to water. Attraction of molecules of the same kind
Not significant
The attraction between two different substances
A bonding between two substances
What is the main goal of atoms?
To bond with other atoms
To form new elements
To maintain a balance of charges
To sit there and do nothing
