Huge science homework finished!

Page 78
Name two ways in which elements can combine into compounds. Ionic and Covalent.
How are atoms connected to each other in covalent compounds? They share electrons and form molecules.
Give one example of a covalent compound. H20.
Give one example of an ionic compound. Sodium Boride.
What needs to happen to atoms of different elements to allow them to form an ionic compounds. They have to gain or lose electrons.

Page 80
What is the meaning of the “poly-” in the term “polyatomic ion”? Multiple, more then one.
How are atoms in a polyatomic ion connected together? Covalent bonds.
What kind of bond can a polyatomic ion form in a compound? An ionic bond.
Give the name and formula of the polyatomic ion used in some roadside-check equipment that tests for alcohol on drivers’ breath. Potassium dichromate.
Give one example of how the polyatomic ion ammonium is used? For fertilizer.

Page 86
Aluminum Iodide
C) Magnesium Phosphide
Calcium Selenide
Potassium Sulfide
Rubidium Fluoride
Silver Nitride
Potassium Bromide
Strontium Phosphide
Calcium Sulfide
Silver Oxide
Cesium Sulfide
Calcium Iodide
Sodium Fluoride

Page 87 1
LiCl
C)NaS2
Al3O2
2
LiF
Mg2Cl
LI2O
Ba3P2
Rb2P
Cs2S
N)CaO

Page 89
CrCl2
Cu2S
E) Fe3P2
MnO
HgBr2
K)SnN how does this one work?
N) PbCl4

Science Questions on page 63.

1. The periodic table is a chart that has every element known to man, it shows the atomic number, mass and its symbol.
2. The atomic number reveals how many protons are in the atom.
3. The atoms are listen in order of atomic number.
4. Helium-2, Gold-79, Oxygen-8, Uranium-92, Iron-26, Mendelevium-101.
5. Potassium
6. Atomic mass measures how many Protons and Neutrons are in a atom.
7. Atomic Mass Unit.
8. It gets bigger.
9. Lithium-6.9, Silicon-28.1, Iron-55.8, Copper-63.5, Mercury-200.6
10. Gold.

How to get to BC Science 8 + 9 online

How to get to BC Science 8 + 9 online

1. BC Science 8 Home Version - http://www.bcscience.com/bc8/pgs/enter_hv.html
2. BC Science 9 Home Version - http://www.bcscience.com/bc9/pgs/enter_hv.html
2. Click "click here to access Home Version Ebook"
3. Username: HA44. Password: SC44.

3 Years old!

MY DOGGYS BIRTHDAY IS TODAY! SHES 3! YAY!

Science Write-up

Question: What temperature (in Celsius) does wax melt at?

Hypothesis: Wax will melt at 60 C.

Procedure: Turn on the hotplate. Observe the wax melt. Record Temperature Every ... Seconds.

Observations: 

The first 6 minutes the temperature increased from 27c to 31c nothing happened.

From 7 to 9 Minutes the temperature increased from 35c to 48c and the wax had melted enough that there was more liquid wax than solid.

From 9 to 18 the temperature increased from 51c to 70c and the wax became mostly liquid, at the 18 minute point there was no more solid wax.

Conclusion: Wax does melt at 60c, but it can melt at lower or higher temperatures, it just take much slower or faster.

Hell's kitchen.

Just watched hells kitchen, very excellent show.

Tada!

I made it, and its epic. Simple as that.