Exam 1 Study Items Flashcards
Group IA is known as:
Alkali Metals
Group IIA is known as:
Alkaline Earth Metals
Group VIA is known as:
Chalcogens
Group VIIA is known as:
Halogens
Group VIIIA is known as:
Noble Gases
What classification of matter is salt water?
Homogeneous mixture
You cannot distinguish the salt when it dissolves into Na+ and Cl- ions and evenly mixes with the water molecules.
In a homogeneous mixture, components are evenly distributed.
What classification of matter is dry ice(CO2)?
Pure substance
Dry ice is composed of one type of molecule, CO2, in a solid state.
What classification of matter is bronze (a metal alloy)?
Mixture
Bronze is composed of copper and tin. While they mix together, they do not form a new chemical substance with a fixed ratio like a compound would.
Alloys are mixtures of 2 or more metals.
Classify the following as either an extensive or intensive property:
Mass
Extensive
Classify the following as either an extensive or intensive property:
Length
Extensive
Classify the following as either an extensive or intensive property:
Density
Intensive
Classify the following as either an extensive or intensive property:
Volume
Extensive
Classify the following as either an extensive or intensive property:
Temperature
Intensive
Classify the following as either an extensive or intensive property:
Color
Intensive
Classify the following as either an extensive or intensive property:
Melting point (or any phase change temperature)
Intensive
Going from a solid to a liquid is called?
Melting
Going from a liquid to a solid is called?
Freezing
Going from a liquid to a gas is called?
Vaporization
(boiling or evaporation)
Going from a gas to a liquid is called?
Condensation
Going from a solid to a gas is called?
Sublimation
Going from a gas to a solid is called?
Deposition
Charging a cell phone is an example of what kind of change?
Chemical
What is the SI unit for amount of a substance?
Mole
Which subatomic particles are found in the** nucleus of an atom**?
Protons and neutrons
All atoms of a given element have the same:
Number of protons
Isotopes of a given element vary in the:
Number of neutrons
Elements in the same group have what similar properties?
Physical and chemical
Rows on the periodic table are known as what?
Periods
**Columns **on the periodic table are know as what?
Groups
(or families)
True or False:
An element can be BOTH a molecule and a compound.
False
Elements can form a molecule but it cannot be a compound.
True or False:
An element is only made up of one type of atom.
True
True or False:
An element can be a molecule.
True
True or False:
Atoms of an element cannot decompose into smaller substances.
True**
The following are examples of what?
H, O, C, Na
Atoms
Building blocks of matter.
The following are examples of what?
C, O2
Elements
Elements are made of the same kind of atom.
O2, NaCl, CO2
These are examples of what?
Molecules
Made up of 2 or more atoms joined together.
NaCl, CO2
These are examples of what?
Compounds
True or False:
All compounds are molecules but not all molecules are compounds.
True
Molecules of the same element are not compounds.
Classify the following substance as either an element or a compound:
Granite
Neither. It’s a heterogeneous mixture.
As an igneous rock, it is composed of several minerals.
Classify the following substance as either an element or a compound:
Air
Neither. It’s a heterogeneous mixture.
Air is composed of several gases: N, O, Ar, CO2, etc.
Which of the following substances is a homegeneous mixture?
a. Granite
b. Iced tea
c. Orange juice with pulp
d. Dry ice
e. White gold
White gold
White gold is an alloy (can be mixed with Ni, Pd, Ag, Pt, Cu).
Convert the following measure:
650 µL equals how many L?
0.000650 L
1 µL = 10-6liters
How do you convert from Celcius to Kelvin?
°C + 273.15 = K
Which of the following is the SI base unit for mass?
a. Ounce (oz)
b. Pound (lb)
c. Kilogram (kg)
d. Gram (g)
Kilogram (kg)
The SI unit for density is:
g/cm3
Who is credited with discovering the proton?
Ernest Rutherford
Who is credited with discovering the electron by applying a potential through electrodes of an
evacuated glass tube, thus forming a stream of electrons, or cathode rays?
J.J. Thomson
Who is credited with developing the Atomic Theory of Matter?
John Dalton
Who is credited with calculating the charge and mass of an electron with his oil drop experiment?
Robert Millikan
Who is credited with organizing the elements into what is now known as the Periodic Table?
Dmitri Mendeleev
Who is credited with determining that atoms have a dense, positively charged nucleus by
performing the alpha particle scattering experiment?
Ernest Rutherford
Who is credited with discovering the charge-to-mass ratio of the electron?
J.J. Thomson
Building blocks of matter.
Atoms
Made up of atoms of the same kind.
Example: O2
Element
A particle composed of 2 or more atoms joined together.
Example: O2, CO2, NaCl
Molecule
Made up of 2 or more different kinds of atoms.
Example: CO2, NaCl
Compound
