Elements Phsa Notes Tv 09

Elements / Atoms / Molecules

Element—

A substance that cannot be separated into something simpler 92 naturally occurring elements in the Universe

What did one Trojan say to the other Trojan before they left the café? Night –Trojan In the morning what did the two Trojans say as they passed on the street?

Hi Trojan Atom = the smallest part of an element that has the properties of that element --Basic building blocks of matter

Atoms of a single type make up Elements = carbon

Molecule = a unit formed by two or more atoms joined together

H2, O2, I2, Cl2 NaCl, H2O, C6H12O6 O2 = molecule of Oxygen O = Elemental Oxygen Compound— Any pure molecular substance in which each molecule

contains atoms of two or more elements in specific proportions H2O H =2 O=1

Atomic Structure

Atomic Structure: Atomic = at the atom level Subatomic = below the atom level Subatomic = parts and pieces of the atom

3 main Subatomic particles 1. Protons = --Have a + charge --Are located in the nucleus --Have a mass of 1 a.m.u. 2. Neutron = --No charge --Located in nucleus

-- Have a mass of 1 a.m.u 3. Electrons = -- Have a -- charge --Located outside the nucleus in orbitals -- Have a mass of almost Zero

Nucleus = center of the atom --Made up of protons and neutrons --All mass is located in the nucleus Nucleus P N

Orbital

Atomic Weight / Mass = The number of protons + neutrons Atomic Number

6

12.01 1

C Carbon

Atomic Mass Element Symbol Element Name

Atomic # = Proton # = Electron # Atomic mass Atomic # Neutron # Elements / Atoms / Molecules

Element— A substance that cannot be separated into something simpler

92 naturally occurring elements in the Universe --Of those 92 only 6 make up 99% of living things. The Six Elements S = Sulfur P = Phosphorus C = Carbon H = Hydrogen O = Oxygen N = Nitrogen What did one Trojan say to the other Trojan before they left the café? Night –Trojan In the morning what did the two Trojans say as they passed on the street? Hi Trojan Atom = the smallest part of an element that has the properties of that element --Basic building blocks of matter Atoms of a single type make up Elements = carbon

Molecule = a unit formed by two or more atoms joined together H2, O2, I2, Cl2 NaCl, H2O, C6H12O6 O2 = molecule of Oxygen O = Elemental Oxygen Compound— Any pure molecular substance in which each molecule contains atoms of two or more elements in specific proportions H2O H =2 O=1 Atomic Structure

Atomic Structure: Atomic = at the atom level Subatomic = below the atom level Subatomic = parts and pieces of the atom

P N

Nucl eus Orbi tal

3 main Subatomic particles 4. Protons = --Have a + charge --Are located in the nucleus --Have a mass of 1 a.m.u. 5. Neutron = --No charge --Located in nucleus -- Have a mass of 1 a.m.u 6. Electrons = -- Have a -- charge --Located outside the nucleus in orbitals -- Have a mass of

At om ic Nu mb er

1 2 . C0 1 a1

6

A E tl oe E m l ie e cn m tM e aS n syt sm N ba m o el

C

r b o n

Atomic

mass Atomic #

Neutron #

almost Zero Nucleus = center of the atom --Made up of protons and neutrons --All mass is located in the nucleus

Atomic Weight / Mass = The number of protons + neutrons

Atomic # = Proton # = Electron #