PART 1 Flashcards
The science that describes matter—its properties, the changes it undergoes, and the energy changes that accompany those processes
Chemistry
Chemistry is also called the ___ science.
Central
Branch of chemistry that deals with metals, minerals, and stuff mostly found on the periodic table.
Inorganic Chemistry
Branch of chemistry that talks about hydrocarbons and their derivatives.
Organic Chemistry
Detection and identification of substances present (qualitative analysis) or amount of each substance (quantitative analysis)
Analytical Chemistry
Branch of chemistry that deals with the processes in living organisms
Biochemistry
Branch of chemistry that covers the behavior of matter
Physical chemistry
Anything that has mass and occupies space
Matter
Measure of the quantity of matter
Mass
Amount of space
Volume
The capacity to do work or to transfer heat
Energy
Energy in motion
Kinetic Energy
Energy at rest
Potential Energy
Reaction where heat is released.
Exothermic
Reaction where heat is absorbed.
Endothermic
Ice melting is an example of ___ reaction (energy change).
Endothermic
Is energy matter?
No
State of matter that fills any container completely and highly compressible.
Gas
____ properties can be observed or measured without changing the identity of the substance.
Physical
____ properties are exhibited by matter as it undergoes changes in composition.
Chemical
Which of the following is a chemical property of matter?
A. Silver is a shiny metal that conducts electricity very well.
B. Sulfur is a yellow powder.
C. A dry piece of paper burns.
D. Pure water, for example, has a density of 0.998 g/cm^3 at 25°C.
C. A dry piece of paper burns.
___ properties are dependent on the amount of substance.
Extensive
____ properties are independent of the amount of substance.
Intensive
Which of the following is an EXTENSIVE property of matter?
A. Hardness
B. Size
C. Melting point
D. Color
B. Size
If the property is unchanged by altering the sample size, it’s an ____ property.
Intensive
A change where one or more substances are used up and one or more new substances are formed.
Chemical Change
A change where there is no change in chemical composition.
Physical Change
Which of the following exhibits a chemical change?
A. lce cream melting
B. Making a sand castle
C. A Macbook falling out of a window
D. Fireworks Exploding
D. Fireworks Exploding
TRUE OR FALSE
A physical change may suggest that a chemical change has also taken place.
True
CLASSIFICATION OF MATTER
It may be separated into pure substances by physical methods (e.g. distillation, filtration).
Mixture
CLASSIFICATION OF MATTER
It cannot be separated into simpler substances by physical methods.
Pure substance
CLASSIFICATION OF MATTER
Components are NOT distinguishable
Homogeneous mixtures
CLASSIFICATION OF MATTER
It has a fixed composition (e.g. 100% ethanol).
Pure substance
CLASSIFICATION OF MATTER
It has a single phase and the same composition throughout (i.e. same amount in any area).
Homogeneous mixtures
CLASSIFICATION OF MATTER
It has variable composition (e.g. 70%, 80%, or 95% ethanol in water).
Mixture
CLASSIFICATION OF MATTER
Preferred for drugs
Homogeneous mixtures
CLASSIFICATION OF MATTER
It does NOT have the same composition throughout (i.e. different amount in various areas) and has multiple phases.
Heterogeneous Mixtures
CLASSIFICATION OF MATTER
Components are distinguishable.
Heterogeneous Mixtures
CLASSIFICATION OF MATTER
It can be decomposed into simpler substances by chemical changes
Compounds
CLASSIFICATION OF MATTER
Water broken into hydrogen and
oxygen gases via electrolysis.
Compounds
CLASSIFICATION OF MATTER
It consists of atoms of two or more different elements bound together.
Compounds
CLASSIFICATION OF MATTER
It cannot be decomposed into simpler substance by chemical changes.
Elements
CLASSIFICATION OF MATTER
It consists of only one kind of atom.
Elements
Most abundant element in the universe
Hydrogen
The smallest unit that retains the properties of an element.
Atom
Theory that states that all matter is composed of atoms and these cannot be made or destroyed.
Dalton’s Theory
The number of protons in the nucleus of an atom that also determines its identity.
Atomic Number (Z)
The sum of the number of protons and the number of neutrons in its nucleus.
Mass Number (A)
Atoms of the same element with different
masses.
Isotopes
They are atoms containing the same number of protons but different numbers of neutrons.
Isotopes
Same mass number, different atomic numbers.
Isobars