Chemical Level of Organization

Define Matter

Anything that occupies space and has mass

Define Elements

Fundamental substances that make up all matter, Ex: Hydrogen (H), Helium (He) , Oxygen (O), Carbon (C)

What is a Molecule

2 or more elements are put together by chemical bonds

Ex: Dihydrogen (H2), Carbon Dioxide(CO2)

What is a Compound

When 2 or more different elements are put together by chemical bonds

Ex: Glucose (C6H12O6), Methane(CH4), Carbon Dioxide (CO2)

11 Major Elements of the Human Body

Oxygen (O)

Carbon (C)

Hydrogen (H)

Nitrogen (N)

Calcium (Ca)

Phosphorus (P)

Potassium (K)

Sulfur (S)

Sodium (Na)

Chlorine (Cl)

Magnesium (Mg)

Protons is a subatomic particle located in the nucleus of an atom

Have a positive charge and a mass of 1 AMU

Neutrons is a subatomic particle Located in the nucleus of an atom

Have a neutral charge and a mass of 1 AMU

Electrons is a subatomic particle Orbiting the nucleus of an atom

Have a negative charge and a mass of 0.0005 amu

Define Atoms

Atoms is a basic building block of matter that contains equal numbers of Protons and Electrons

Define Isotopes

An Isotope is an atom that the number of protons and electrons are constant but the number of neutrons are different

Define a Periodic Table

A Periodic table is how we organized all of the 92 elements that are present on earth

Define a Atomic Number

Small number on top and is the number of protons

Define Atomic weight

The average mass of all the isotopes of a given element.

Number on the bottom, Ex: 12.011

Define Atomic Mass

The total sum of protons n neutrons in the nucleus.

Ex: Hydrogen has 1 neutron and 1 proton so the atomic mass is 2

How many Maximum Electrons can the first shell of the atom hold

2 Maximum

How many electrons can the 2nd shell hold

8 maximum

What is a Valence Shell

The outermost shell of an atom is called the valence shell

What is a un reactive atom?

An Atom with full valence shells

What is a reactive atom?

An atom with valence shells that are not full