D425 Section 1 Chem -150 Questions with 100%
Correct Solutions
Chemistry - ANSWER the study of matter- its composition, properties, and
transformations
Matter - ANSWER Anything that has mass and takes up space
Matter is composed of - ANSWER atoms
Mass - ANSWER the amount of matter in an object, essentially constant (not the same
as weight that changes)
Volume - ANSWER Amount of physical space occupied by a substance or an object
Matter can be divided into 2 categories - ANSWER pure substance and mixtures
pure substance - ANSWER (Matter category) constant composition and properties,
Alumiand is made up of a single type of element or compound
Mixture - ANSWER (matter category) the physical combination of 2+ substances
Subatomic particles - ANSWER Components of an atom that includes electrons, protons,
neutrons
Elements - ANSWER are composed of a single type of atom, either as a single atom or
chemically bonded together
,Periodic table - ANSWER displays all known elements according to similarities between
properties
Aluminum is an example of a pure substance or mixture, and why? - ANSWER Pure
substance because a sample would contain only aluminum atoms
Compound - ANSWER A pure substance made up of atoms of two or more different
elements joined by chemical bonds (in a particular ratio). They have uniform and
definite composition
Mixtures - ANSWER are another form of matter and are a physical blend of 2+ pure
substances, each of which retains its own identity and properties in the mixture
Examples of a mixture - ANSWER salt water- only the form of salt changes when it is
dissolved into water, but their composition and properties remain the same, & cheese
the 2 types of mixtures are - ANSWER homogeneous and heterogeneous
Homogeneous mixture - ANSWER A mixture in which substances are evenly distributed
throughout the mixture, exist in a single phase or layer because of uniform composition
Is salt water a homogeneous or heterogeneous mixture? - ANSWER Homogeneous- the
amount of salt can vary from one sample to another- single phase
Heterogeneous mixture - ANSWER a mixture in which the composition is not uniform
throughout, have 2+ phases as they do have uniform composition (Oil and water-
doesn't mix and separate into 2 phases)
, Heterogeneous mixture example - ANSWER vegetable soup- a spoonful will contain
varying amounts of veggies
Alloy - ANSWER a mixture composed of 2+ elements, at least one which is a metal.
Commonly used in manufactured items because the properties of these metal mixtures
are often superior to pure metal
Alloy examples - ANSWER Brass (copper + zinc) , bronze (copper + tin) , steel (iron +
carbon)
States of matter - ANSWER solid, liquid, gas; depends on temp and each state has its
own unique set of physical properties
Particle - ANSWER a small piece of matter
Molecule - ANSWER a unit of 2+ nonmetal atoms joined by a chemical bond
Intermolecular interaction - ANSWER the attractive and repulsive forces that occur
between the molecules in a substance, responsible for most physical and chemical
properties of matter
Solids - ANSWER Definite shape and volume, particles very close together, small energy,
strong relative intermolecular attraction between particles
Ionic solids - ANSWER particles arranged in a crystal lattice, sometimes visible (table
salt)
Correct Solutions
Chemistry - ANSWER the study of matter- its composition, properties, and
transformations
Matter - ANSWER Anything that has mass and takes up space
Matter is composed of - ANSWER atoms
Mass - ANSWER the amount of matter in an object, essentially constant (not the same
as weight that changes)
Volume - ANSWER Amount of physical space occupied by a substance or an object
Matter can be divided into 2 categories - ANSWER pure substance and mixtures
pure substance - ANSWER (Matter category) constant composition and properties,
Alumiand is made up of a single type of element or compound
Mixture - ANSWER (matter category) the physical combination of 2+ substances
Subatomic particles - ANSWER Components of an atom that includes electrons, protons,
neutrons
Elements - ANSWER are composed of a single type of atom, either as a single atom or
chemically bonded together
,Periodic table - ANSWER displays all known elements according to similarities between
properties
Aluminum is an example of a pure substance or mixture, and why? - ANSWER Pure
substance because a sample would contain only aluminum atoms
Compound - ANSWER A pure substance made up of atoms of two or more different
elements joined by chemical bonds (in a particular ratio). They have uniform and
definite composition
Mixtures - ANSWER are another form of matter and are a physical blend of 2+ pure
substances, each of which retains its own identity and properties in the mixture
Examples of a mixture - ANSWER salt water- only the form of salt changes when it is
dissolved into water, but their composition and properties remain the same, & cheese
the 2 types of mixtures are - ANSWER homogeneous and heterogeneous
Homogeneous mixture - ANSWER A mixture in which substances are evenly distributed
throughout the mixture, exist in a single phase or layer because of uniform composition
Is salt water a homogeneous or heterogeneous mixture? - ANSWER Homogeneous- the
amount of salt can vary from one sample to another- single phase
Heterogeneous mixture - ANSWER a mixture in which the composition is not uniform
throughout, have 2+ phases as they do have uniform composition (Oil and water-
doesn't mix and separate into 2 phases)
, Heterogeneous mixture example - ANSWER vegetable soup- a spoonful will contain
varying amounts of veggies
Alloy - ANSWER a mixture composed of 2+ elements, at least one which is a metal.
Commonly used in manufactured items because the properties of these metal mixtures
are often superior to pure metal
Alloy examples - ANSWER Brass (copper + zinc) , bronze (copper + tin) , steel (iron +
carbon)
States of matter - ANSWER solid, liquid, gas; depends on temp and each state has its
own unique set of physical properties
Particle - ANSWER a small piece of matter
Molecule - ANSWER a unit of 2+ nonmetal atoms joined by a chemical bond
Intermolecular interaction - ANSWER the attractive and repulsive forces that occur
between the molecules in a substance, responsible for most physical and chemical
properties of matter
Solids - ANSWER Definite shape and volume, particles very close together, small energy,
strong relative intermolecular attraction between particles
Ionic solids - ANSWER particles arranged in a crystal lattice, sometimes visible (table
salt)
