To prepare for your midterm: • Review all tests, quizzes, and labs • Look over review sheets and problem sets • Complete this review sheet
1. Know the following terms:
proton
electron
nucleus
neutron
atom
mass number
atomic mass
atomic mass unit
isotope
atomic number atomic orbital
ground state aufbau principle Pauli exclusion principle
electron configuration Heisenberg uncertainty principle
atomic emission spectrum photon
photon
frequency
quantum
wavelength
spectrum
electronegativity periodic law ionization energy atomic mass
atomic radius
period metal
group
transition metal cation anion
structural formula diatomic molecule valence electrons
2. What do the following prefixes mean: mega, kilo, deci, centi, milli, micro, nano, pico
mega (M) = 106, kilo (k) = 103, deci (d) = 10-‐1, centi (c) = 10-‐2, milli (m) = 10-‐3, micro (μ) = 10-‐6,
nano (n) = 10-‐9, pico (p) = 10-‐12 3. Describe the difference between accuracy and precision.
Accuracy is getting the desired result (For example: getting a 100 on the midterm)
Precision is getting the same result every time (For example: getting a 75 on every test) 4. What is the difference between an extensive and an intensive property?
Extensive property changes based on the amount of substance (mass, volume)
Intensive properties are independent of amount (color, texture, density) 4. State the number of significant digits in
a. 0.00451
b. 1.00451
c. 4.50
d. 450 3
6
3
2 5. Complete the following calculations and report the answer to the correct number of significant figures.
a. 4.067 + 2.2
b. 12.65 / 4.52 c. 101.3 x 2.44
6.3
2.80
247 6. Convert the following to scientific notation a. 120,000
b. 0.000495
c. 259 1.2 x 105
4.95 x 10-‐4
2.59 x 102 7. A brick used in the construction of pottery kilns is 11.0 cm wide, 6.0 cm tall, and 22.7 cm long. The brick has a mass of 2950 g. What is the
Related Documents: Essay about Periodic Table and Mass Atomic Mass
Copper is the 29th element in the periodic table, located more specifically at group 11, period 4. Because of its chemical and physical attributes, it is a transition metal, which denotes high boiling and melting points. Both a conductor of heat and electricity, Copper is ductile and malleable. Its symbol “Cu” derives from the Latin cuprum. Copper is also valued for its two-for-one practicality: it is a vital nutrient that has antibacterial properties. Aside from what many people generally know about…
Isotopes and Average Atomic Mass Unit 1 Lecture 2 Subatomic Particles Charge (e)* Proton +1 Electron -1 Mass (amu) 1 0.0005 (relatively 0) *Note: The charges are being compared Neutron relative to0each other, they do have 1 specific values (C/g), see Thomson slides Honors… • A neutral atom has an equal amount of protons and electrons • Protons and neutrons have equal masses (they are actually a little bit different, but this is several decimal places out and using a very expensive measuring…
Chemistry notes – 2013 – text book chapter 6 Periodic table: A table of the chemical elements arranged in order of atomic number. Element: chemically the simplest substances that cannot be further simplified. Atoms of the substance all have the same number of protons. Compound: a substance formed when two or more chemical elements are chemically bonded together Atom: The basic unit of a chemical element. Containing protons, neutrons and electrons. Nucleus: The positively charged central…
Chapter 2 Atoms, Molecules, and Ions Summary of the Chapter • Atomic Structure: protons, electrons and neutrons • The Periodic Table: how is the periodic table organized, metallic and non metallic elements • Molecules and Molecular Compounds: chemical formula • Ions and Ionic Compounds: predicting charges, names and formulas • Binary Molecular Compounds: names and formulas Atomic Theory of Matter A little bit of history: • Democritus (460–370 BC) and other Greek philosophers were the first in…
Chapter 2: Atoms and Atomic Theory Chapter 3: Chemical Compounds What in the world isn’t Chemistry • Matter is the physical material of the universe. • On the microscopic level, matter consists of atoms and molecules. • As we know, molecules may consist of the same type of atoms or different types of atoms. We encounter chemistry in our everyday lives Lavoisier, 1743-1794 Conservation of Matter - A chemical equation must be balanced for mass. Dalton (1766 – 1844) Atomic Theory - A chemical…
the periodic table organizes the elements according to general patterns of similarity. Below is a very small image of the periodic table. It is basically unreadable in terms of specific information, but it allows us to easily look at the periodic tables structure general trends. Figure %: A very small periodic table The vertical columns of the periodic table (marked by yellow stripes in the figure) are called groups. The horizontal rows are called periods. There are 18 groups and 7 periods…
Non-ductile Periodic Table Element - a pure substance made up of only one type of matter Compound – a pure substance made up of two or more elements chemically combined Mixture – a combination of two or more substances not chemically combined Homogeneous – a mixture that appears uniform Heterogeneous – a mixture in which the components are visibly different Atomic Number – number of protons and electrons (the whole number in the box on the periodic table) Atomic…
Periodic Trends 1. Atomic Radius Horizontal: The atomic radius of an element decreases from left to right within each period on the periodic table. Explanation: In understanding this trend, one must consider the charge and energy of the valance electrons. As you move from left to right on the periodic table, the number of protons increases in increments of one. In addition to this, the number of electrons also increases by increments of one. These electrons are added to the same energy…
- CC l. texture - PP c. silver tarnishing - CC m. reactivity - CP d. burning wood - CC n. density - PP e. changing state - PC o. crystallization - PC f. distillation of alcohol - PC p. a leaf changes color - CC g. the mass and the color of an object – PP q. sanding wood - PC h. changes that alter the identity of a substance – CC r. melting ice - PC i. peach spoiling - CC s. bracelet turning your wrist green - CC j. copper bowl tarnishing - CC t. glue gun…
ALL ABOUT: URANIUM! Table of Contents: 1: General Idea: Page: 3 2: History: Page: 4 3: Uses: Page: 5 4: Glossary: Page: 6-7 5: Bibliography: Page: 8 1: General Idea: The Basics: -Atomic Number: 92 -Atomic Mass: 238 amu -Symbol: U -Number of Protons: 92 -Number of electrons: 92 -Number of neutrons: 146 -Uranium is one the densest materials known. (19 g/cm3) 1.6 times denser than lead. It also oxidizes at room temperature. If you grind it into…