## Atomic FactsJoshua matthews/Courtney riddle/ 4th core/ Due by March 2nd

What is an atom? An atom is the smallest unit of any element. It is in every element known to man, including us. Atoms were discovered by j.j Thomson when he was doing work on Cathode rays.

But its much more complicated then what you may think. We learn today what an atom is and what makes it tick...

#### The Periodic Table

The Periodic table is a table that was configured by the man known as Dmitri Mendeleev. He made it by using the atomic weight of the elements. But soon a man named Henry Moseley Came along and modified the element table, not by weight, but rather by Charge.

It is broken down into many groups.

Metals: Metals are the most solid in the table, it is often judged by weight or ductility. The ability to rust. Etc. Its found widely around the table and is one of the most abundant. (Ex: Iron,Gold)

Non-Metals: Non-Metals are, as you could guess, anything but the metals. Such as gasses or liquid.

Metaloids: Metalloids are a interesting group. They are a step ladder in between the metals and non-metals, a bridge, they hold a little bit of both worlds but they do make semiconductors.

Protons: Protons are positive charged particles around an atom.

Electrons: They are primary the same thing but they instead orbit around the atom. Negatively charged.

Neutrons: Neutrons are mainly a sorta "Relaxed" Particle. The center.

The most reactive elements are the ones that are the farthest from the noble gasses. The noble gasses are the most relaxed and refused to be altered.

17 groups and 7 periods.

Atomic numbers.

The atomic number explains how many protons and electrons are in a element.

Lithium can be cut with a knife. Its that soft.

The mass number, as figured, Explains the mass of an element.

You can find the number of electrons by looking at the atomic number.

ATOMS

Here is a diagram of an atom. The (+) are positives while the - are negative. Neutrons are O.

Valence electrons are a very special type of electron. They aid in the process known as chemical bonds, which help in arranging formulas. Formulas are the bonding of elements.

The atom diagram. How to draw it...

Chemical Equations

Now when you look at an Chemical formula you first have to list the elements on both sides of the line. you can have multiple variables of elements.

Now on the left side of a chemical equation there is the reactants, the elements that go into the equation to make a product through chemical reaction. Hence the reason why it is called reactant.

Product is, as some would guess, the outcome of a chemical equation. It is the part the scientists are looking forward to. It can have traits as the reactants but its more exciting if not.

Arrows/Yield. Arrows are what separates the reactants from the product. Just like the (=) sign in a math equation, the arrow plays a similar part showing the outcome, the products, or the more accurate yield. Yield is the product of the

An example of how to do a balancing Equation.

Chemical/Physical change.

In life elements and the such can change in a variety of ways. Either in ways in which we could clearly see it has changed its shape or weight. Or in more chemical ways, such as a change of color.

Chemical changes are ways that change an item at a more smaller and technical way. Such as something combusting into flames (a match) Or something being dissolved. Somethings may change smell or may fuse onto something. Mixing one chemical to the next, fire and gas, carbon to oxygen. Its basically a change that cannot go back. Now physical are a bit more on the brutal side. A physical change is something like Ice breaking. When something changes shape in some way or form. Or like freezing water. It can be cause in more brutish ways, crushing melting or breaking. Pulling apart.

Smell- Did the smell change? Better? worse? Old gym shoes?

Heat - Well is it on fire? ( :D ) or at least warmer.

Precipitate- What did the precipitate look like? Did it make bubbles? That can be a sign of gas.

Color- The pink to red? yellow cheese now green cheese? Basically check for a color change. Which could be fairly easy to do*.

Gas- Okay basically what does it look like. Look above it. See steam= See gas.

*Open Your eyes. Cut on the light. Why cant you see?

Credits:

Created with images by yumikrum - "atomic" • Steve Snodgrass - "Max's Lemonade at Dewey's Pizza"