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NAS 2 Exam – Questions And Answers
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NAS 2 Exam – Questions And Answers
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NAS 2 Exam – Questions And AnswersMatter ✔️Ans - anything that has mass and occupies space
Atom ✔️Ans - Smallest particle of an element
Molecule ✔️Ans - A group of atoms bonded together
Element ✔️Ans - A substance that cannot be broken down into simpler
substances
Proton ✔️Ans - positively charged particle
Neutron ✔️Ans - particle with no charge
Electron ✔️Ans - negatively charged particle
atomic number ✔️Ans - the number of protons in the nucleus of an atom
ionic bond ✔️Ans - A chemical bond resulting from the attraction
between oppositely charged ions.
polar covalent bond ✔️Ans - A covalent bond in which electrons are not
shared equally
non polar covalent bond ✔️Ans - a covalent bond in which the bonding
electrons are shared equally by the bonded atoms, resulting in a balanced
distribution of electrical charge
Ion ✔️Ans - An atom or group of atoms that has a positive or negative
charge.
Cation ✔️Ans - A positively charged ion
Anion ✔️Ans - A negatively charged ion
, hydrophobic interactions ✔️Ans - a type of weak chemical interaction
caused when molecules that do not mix with water coalesce to exclude
water
hydrogen bond ✔️Ans - A type of weak chemical bond formed when the
slightly positive hydrogen atom of a polar covalent bond in one molecule is
attracted to the slightly negative atom of a polar covalent bond in another
molecule.
Solution ✔️Ans - A homogeneous mixture of two or more substances
Solute ✔️Ans - A substance that is dissolved in a solution.
Solvent ✔️Ans - the substance in which the solute dissolves
colloidal suspension ✔️Ans - Particles remain suspended within the
liquid
Emulsion ✔️Ans - The colloidal dispersion of one liquid in another
inorganic molecules ✔️Ans - molecules that do not contain carbon and
hydrogen
organic molecules ✔️Ans - molecules that contain carbon and hydrogen
functional groups ✔️Ans - the components of organic molecules that are
most commonly involved in chemical reactions
amino group ✔️Ans - a chemical group consisting of a nitrogen atom
bonded to two hydrogen atoms
methyl group ✔️Ans - A chemical group consisting of a carbon atom
bonded to three hydrogen atoms.
carboxyl group ✔️Ans - A chemical group consisting of a carbon atom
double-bonded to an oxygen atom and also bonded to a hydroxyl group.
hydroxyl group ✔️Ans - A chemical group consisting of an oxygen atom
bonded to a hydrogen atom.
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