TEAS 7 CHEMISTRY EXAM QUESTIONS
WITH COMPLETE ANSWERS
What is active transport? - Answer-the movement of ions or molecules across a cell
membrane into a region of higher concentration, assisted by enzymes and requiring
energy. ACTIVE=ENERGY
What is passive transport? - Answer-The movement of materials across the cell
membrane without using cellular energy. PASSIVE=NO ENERGY
What is diffusion? - Answer-The movement of particles from an area of high
concentration to an area of low concentration.
What is an example of Diffusion? - Answer-For example, when you add a drop of food
coloring to water, immediately, the food coloring begins to spread (or diffuse) throughout
the water, eventually reaching equilibrium where all areas have the same concentration
of coloring:
What is a concentration gradient? - Answer-difference in the concentration of a
substance from one location to another
What is Kinetic Energy? - Answer-the energy an object has due to its motion.
An example of kinetic energy is - Answer-running water
KCl is an example of which type of bond? - Answer-ionic
What is an ionic compound? - Answer-Ionic compounds are compounds made up of
ions that form charged particles when an atom (or group of atoms) gains or loses
electrons. A cation is an ion charged positively; an anion is an ion charged negatively.
What is an ionic bond? - Answer-Formed when one or more electrons are transferred
from one atom to another.
Which of the following is exchanged between two or more atoms that undergo ionic
bonding? - Answer-Valence electrons
What is an ion? - Answer-Ions are formed when an atom gains or loses electrons
What is a negative ion? - Answer-A negative ion is created when an atom gains
electrons. Electrons have a negative charge.
What is a positive ion? - Answer-A positive ion is created when an atom loses electrons.
Electrons have a negative charge.
, What is a chemical bound? - Answer-1. Atoms of the same element may bond together
to form molecules or crystalline solids.
2. involves atoms combining to form chemical compounds and bring stability to the
resulting product. I
What is a valence electrons? - Answer-electrons in the outermost shell
How do you find the number of protons? - Answer-Look at the atomic number it is the
same.
How do you find the number of electrons? - Answer-same as the number of protons.
How to find the number of neutrons in an atom? - Answer-To find the number of
neutrons, you will need to subtract the atomic number from the atomic mass.
Remember that the atomic number is the same as the number of protons, which you
have already identified
Where can I find the atomic number of an element? - Answer-The atomic number is
located above the element symbol.
Where can I find the atomic mass of an element? - Answer-The atomic mass can be
found underneath the symbol for the element.
What is an electrical charge? - Answer-For example, if we have an object made up of
14 protons, which are positive, and 12 electrons, which are negative, then we end up
with a net charge of positive 2. We simply add 1 for each proton and subtract 1 for each
electron. If the resulting number is positive, we have a net positive charge and if the
resulting number is negative, we'll have a net negative charge. Note that neutral
particles will make no difference in the net charge.
What does combustion produce? - Answer-energy, carbon dioxide, and water
Covalent bonds - Answer-are in many biological compounds, including lipids and
carbohydrates.
Ionic bounds are found in what elements? - Answer-Ionic bonds form only between
metals and nonmetals. That's because metals "want" to give up electrons, and
nonmetals "want" to gain electrons.
(found in salts)
Hydrogen bounds are found in what elements? - Answer-Hydrogen bonding occurs only
in molecules where hydrogen is covalently bonded to one of three elements: fluorine,
oxygen, or nitrogen
Which of the following is correct?
WITH COMPLETE ANSWERS
What is active transport? - Answer-the movement of ions or molecules across a cell
membrane into a region of higher concentration, assisted by enzymes and requiring
energy. ACTIVE=ENERGY
What is passive transport? - Answer-The movement of materials across the cell
membrane without using cellular energy. PASSIVE=NO ENERGY
What is diffusion? - Answer-The movement of particles from an area of high
concentration to an area of low concentration.
What is an example of Diffusion? - Answer-For example, when you add a drop of food
coloring to water, immediately, the food coloring begins to spread (or diffuse) throughout
the water, eventually reaching equilibrium where all areas have the same concentration
of coloring:
What is a concentration gradient? - Answer-difference in the concentration of a
substance from one location to another
What is Kinetic Energy? - Answer-the energy an object has due to its motion.
An example of kinetic energy is - Answer-running water
KCl is an example of which type of bond? - Answer-ionic
What is an ionic compound? - Answer-Ionic compounds are compounds made up of
ions that form charged particles when an atom (or group of atoms) gains or loses
electrons. A cation is an ion charged positively; an anion is an ion charged negatively.
What is an ionic bond? - Answer-Formed when one or more electrons are transferred
from one atom to another.
Which of the following is exchanged between two or more atoms that undergo ionic
bonding? - Answer-Valence electrons
What is an ion? - Answer-Ions are formed when an atom gains or loses electrons
What is a negative ion? - Answer-A negative ion is created when an atom gains
electrons. Electrons have a negative charge.
What is a positive ion? - Answer-A positive ion is created when an atom loses electrons.
Electrons have a negative charge.
, What is a chemical bound? - Answer-1. Atoms of the same element may bond together
to form molecules or crystalline solids.
2. involves atoms combining to form chemical compounds and bring stability to the
resulting product. I
What is a valence electrons? - Answer-electrons in the outermost shell
How do you find the number of protons? - Answer-Look at the atomic number it is the
same.
How do you find the number of electrons? - Answer-same as the number of protons.
How to find the number of neutrons in an atom? - Answer-To find the number of
neutrons, you will need to subtract the atomic number from the atomic mass.
Remember that the atomic number is the same as the number of protons, which you
have already identified
Where can I find the atomic number of an element? - Answer-The atomic number is
located above the element symbol.
Where can I find the atomic mass of an element? - Answer-The atomic mass can be
found underneath the symbol for the element.
What is an electrical charge? - Answer-For example, if we have an object made up of
14 protons, which are positive, and 12 electrons, which are negative, then we end up
with a net charge of positive 2. We simply add 1 for each proton and subtract 1 for each
electron. If the resulting number is positive, we have a net positive charge and if the
resulting number is negative, we'll have a net negative charge. Note that neutral
particles will make no difference in the net charge.
What does combustion produce? - Answer-energy, carbon dioxide, and water
Covalent bonds - Answer-are in many biological compounds, including lipids and
carbohydrates.
Ionic bounds are found in what elements? - Answer-Ionic bonds form only between
metals and nonmetals. That's because metals "want" to give up electrons, and
nonmetals "want" to gain electrons.
(found in salts)
Hydrogen bounds are found in what elements? - Answer-Hydrogen bonding occurs only
in molecules where hydrogen is covalently bonded to one of three elements: fluorine,
oxygen, or nitrogen
Which of the following is correct?
