Periodic Table
What is the element symbol for oxygen?
O
BRAIN BREAK Q: What is Miss H's favorite food?
Cheeseburger or pizza :)
Is wood burning a physical or chemical change?
Chemical
CO2
C = 1
O = 2
Where in the atom are protons and neutrons located?
nucleus
How many protons does Nitrogen have?
7
True or false: molecules and compounds are atoms that are chemically bonded together
true
What are 3 signs that a firework is a chemical change?
Smoke
Sound
Light
Heat
Smell
Color change
How many elements and atoms are there?
C5H2O6ArO
4 different elements (C, H, O, Ar)
15 total atoms
Where are electrons located and what are their charge?
outside of the nucleus/negative
How do you find the number of neutrons an element has?
Atomic Mass - Atomic #
compound and molecule
Give 3 examples of a chemical change
have to be approved by Miss H :)
The number in front of the element is called?
2Cl
coefficient
The Lewis Dot Structure quickly shows us the amount of ____________ an atom has
valance electrons
Each row on the periodic table is called a .....
period
What is the correct phrase?
1. All molecules are compounds but not all compounds are molecules
2. All compounds are molecules but not all molecules are compounds
2. All compounds are molecules but not all molecules are compounds
When you are cooking pasta and you boil a pot of water, bubbles form. Why is this NOT a chemical change?
We are just increasing the energy of the water molecules (they are moving faster). The water molecules stay water molecules.
BRAIN BREAK Q: what is Miss H's favorite Christmas movie?
Elf :)
Draw a Lewis Structure of Carbon
Have to be approved by Miss H :)
How many valence electrons does Boron have?
3
What is the difference between a compound and a molecule?
A molecule is any two or more atoms chemically bonded.
A compound is any two or more DIFFERENT atoms chemically bonded together
What are the 5 indicators that a chemical change is/has taken place?
1. temperature change
2. Precipitate formed
3. Light produced
4. Gas produced
5. Color change
Identify and count the number of atoms:
5(NH4)2O
H = 40
O=5
Draw a Bohr Model of Neon