Bell Ringer [3 Minutes] Biochemistry Vocabulary Cloze
Dec 23, 2015
Bell Ringer [3 Minutes]Biochemistry Vocabulary Cloze
MYP Biology: Atomic StructureUnit 3: Life Takes Chemistry
What is Matter?
• Anything with mass and volume (it “takes up space”)
• Made up of atoms
The outlines of Silicon atoms as seen through a Scanning-Tunneling
Microscope
• 4 main states of matter:
–Solid–Liquid–Gas–Plasma
What is Matter?
The States of Matter:
What is an Atom?
• Atoms are the smallest particle units of MATTER—EVERYTHING is made of atoms
• Made of three ‘subatomic’ particles:–PROTON (+)–NEUTRON (no charge)–ELECTRON (-)
What is an Atom?
• The NUCLEUS, or the core of the atom, contains PROTONS and NEUTRONS
• Electrons orbit the nucleus at different energy levels. This is called the ELECTRON CLOUD
What is an Atom?ELECTRONS
Nucleus:PROTONS &NEUTRONS
ELECTRON CLOUD
What is an Element?
• An element is a substance made up of ONE type of atom, EX:
What is an Element?
• Nearly 100 naturally-occurring elements (plus nearly 20 more synthetic ones)
• All known elements organized in Periodic Table
What is an Element?
Oxygen (O), Carbon (C), Hydrogen (H),
and Nitrogen (N) make up 96% of the human body:
10,000,000,000+ cells
1,000,000,000,000,000,000,000,000+ atoms
Meet the Elements: Iodine • Needed by humans and other higher animals
for thyroid hormones which regulate metabolism
• Today, most salt is “iodized”
Meet the Elements: Neon • Chemically ‘inert’ (does not react)• Produces red-orange light in ‘neon’ signs—
also used in T.V. tubes
Meet the Elements: Carbon
• A building-block of all organisms—also makes up graphite and diamonds
Meet the Elements: Iron
• Common metal used in industry• Helps red blood cells bind and
carry oxygen through body
Meet the Elements: Calcium
• Most abundant metal in most animals• “Builds strong bones” (99% of human
Calcium is stored in bones and teeth) and helps blood clotting
What is an Ion?
• An atom that has lost or gained electrons to take on a positive or negative charge
Na+A Sodium ion
Cl-A Chloride ion
How do Atoms Combine?
Atoms link together by forming chemical BONDS
Two main types of bonds:
1. Ionic Bonds Based on the electrical force between oppositely-charged ions
2. Covalent Bonds Electrons are shared between atoms
What is a Molecule?
Two or more atoms are joined by COVALENT bonds to form a MOLECULE
What is a Compound?
Compounds are molecules made up of atoms of DIFFERENT elements bonded together
H₂OCO₂
SiO₄NaCl
How are Elements Organized?
Periodic Table
There are 3 main types of elements in the Periodic Table:
Atomic Number: Number of Protons
Avg. Atomic Mass: Number of Protons + Neutrons
Symbol
Full Name
How are Elements Organized?
How are Elements Organized?
Atomic Number tells the number of PROTONS and ELECTRONS in the atom
Atomic Mass tells the number of PROTONS plus the amount of NEUTRONS since these are the only two particles with a significant mass.
1 23 4 5 6 7 8 9 1011 12 13 14 15 16 17 18
Elements are arranged in the Periodic Table order of Atomic Number.
Now, some Periodic Math!
How many protons?
5How many electrons?
5How many neutrons? (round atomic mass to nearest whole number—11)?
6BORON
ATOMIC NUMBER
PROTONS
NEUTRONS
ATOMIC MASS
ELEMENT
10 20 Ne3 4 Li1 1 H
10
103 701
Understanding Check!
• Which of the following is made up of CELLS?
Understanding Check!
• Which of the following is made up of ATOMS?
Understanding Check!
Three particles of the ATOM?
1.Proton
2.Neutron
3.Electron
Understanding Check!
Compound, Ion, Element, or Molecule…?
OOxygen
O¯Oxide CO₂
Carbon Dioxide
O₃Ozone
Understanding Check!
IONIC BOND or COVALENT BOND?
Na + Cl¯ = NaCl+
C + O₂ = CO₂
THE END