Thursday, October 20, 2011

Atom Simulation

What happens when you add a proton?
When you add a proton you get hydrogen and when you add a proton to a atom it is stable. 

What does it mean when an atom is stable? What does it mean when atom is unstable?
When the atom can hold its nucleus together it becomes stable. This includes the protons,electrons and the neutrons. Unstable atoms are always radioactive. They cannot hold all their parts together and make radiation. 


How do you make an atom stable? What do you need to do?
When you add or subtract a number of protons depending on how much the atom has it makes the atom stable. If you have the same amount of neutrons and protons, it is the easiest way to stabilize an atom. There are also some exceptions in the periodic table. Examples are from the noble gasses. 


What is the valence electron pattern as you move across the periodic table?
The electrons placed in the outer shell of an atom is called its valence electrons. Valence electrons can be a part of another atom or can be shared with another atom. The valence electron for each period starts from 1 and ends at 7. After three can also be a -4,-3,-2 and -1.


What happens to the atom when there is more protons, more neutrons, or more electrons?
In helium nothing happens, but normally atoms turn to be unstable. 


What's the difference between a positive and a negative ion?
When an atom or an element looses/gains an electron ions are formed. Ions have a positive charge when it looses and electron because in that case the number of protons would be bigger than the number of electrons. If the positive happens an ion becomes negatively charged. 



Tuesday, October 11, 2011

Reflection on Silly Puddy

Last class we made a silly putty from glue, water, baking soda and an acid. We had a plastic cup and for this assignment I worked with Philipp because than we could both but the amount times two on one cup so it was bigger. When we started putting an amount of all these things it was very wet and you could stir easily. We wanted it to be hard so put more acid than in the procedure, but it still didn't work. At the end our silly putty was big but it didn't work out that good, but it was still a lot of fun.


Tuesday, September 13, 2011

Periodic Table of Metals and Non-metals and the groups of it

Metals and Non-metals


  Periodic Table of Elements 



My Scientific Vacation

My holiday was not as scientific as possible. But I traveled a lot. I got to see Italy for the first time and I was in the sea. I went there with some friends from Turkey for a championship and we had a lot of free time that we discovered interesting stuff on the beach. When we were swimming in the sea, we found some kind of little sea creatures. We couldn't really understand what it was. But than when we asked a men, he said that those could be poisonous in other places but it wasn't in this sea. My friend was trying to pick it with his hand and feel it. We saw one part of the sea where the whole surface of the sea was filled with these and than I remembered from some pictures that in most seas it is like that. My friend took it in his hand and it had a tail. He realized that it was  really fast and also slippery. He was holding the creature from its tail. Some had long tails, which could be poisonous, but my friend seemed like he did not really care. In my holiday I discovered a  lot of stuff in the sea and it was interesting, cool and fun.


Wednesday, September 7, 2011

Section 1: Elements and Atoms Assessment

Reviewing Key Concepts:
1. a. Defining What is matter? What is an element?
Matter is anything that has mass and takes up space. 2000 years ago, the ancient Greeks believed that all matter was made up of four elements. Which were air, earth, fire and water.

Elements are the simplest pure substances, and they cannot be broken down into any other substances.

b. Explaining  Why are elements called the building blocks of matter?
They are often called the building blocks of matter because all matter is composed of one element or a combination of two or more elements.

c. Inferring  Water is compound. Does water contain elements? Explain.
Yes, there are two elements in water. Oxygen and hydrogen. Water consists of  two hydrogen and one oxygen. 

2. a. Reviewing In general, why did atomic theory change in time?
Atomic theory grew as a series of models that developed from experimental evidence. As more evidence was collected, the theory and models were revised. 

b. Describing Describe Bohr's model  the atom. What specific information did Bohr contribute to scientists' understanding of the atom?
Bohr showed that electrons could have only specific amounts of energy, leading them to move in certain orbits.

c. Comparing and Contrasting How is the modern atomic model different from Bohr's model? Why did scientists revise Bohr's model? 
The modern atomic model was different from Bohr's model because this new particle was hard to detect because it has no electrical charge even though it was nearly the same mass as a proton.