Lewis Dot
Draw the Lewis Dot model for Bromine (Br)
Use the periodic table behind Miss Crandall.
Should have Br in the middle, surrounded by two dots max on each side, but one side will only have 1 dot. This is because there are only 7 valence electrons.
Explain what happens at the atomic level of something that is less dense than water.
The atoms are spread out more than if something was more dense than water.
This type of heat transfer is through direct contact.
Conduction
A broken stick is an example of....
a physical change
Use the periodic table behind Miss Crandall.
Should have Ca in the middle with two dots together on the same side. This is because there are only two valance electrons.
Draw how a solid, liquid and a gas are represented as atoms.
Have to look.
This type of heat transfer is through heat waves.
Radiation
Cleaning with baking soda and vinegar is an example of....
a chemical change
Draw an atom of Magnesium (Mg) and an atom of Oxygen (O) bonding.
Use the periodic table behind Miss Crandall.
Mg will have two dots being shared around O (which originally had 6) to complete O and make it a happy atom with the full octet rule. 8 electrons around the atom.
Draw what happens to atoms when they become heated.
Basically they'll start in a semi uniformed look, but with heat added, they'll get "excited" and move around. This is why metal expands.
Explain, but basically convection currents, liquid warms and rises, then cools and sinks to start the process over again.
Name two signs there has been a physical change.
Change in shape, size. It can be brought back to its original form. Phase changes
When Na bonds with Cl, it creates salt (NaCl). Is this a covalent or ionic bond?
What makes it so?
This is a ionic bond because a metal and a nonmetal are bonding together.
Draw in three images how air is effected by being cooled down, but at the atomic level.
Have to look, but basically the atoms should be getting closer together the more towards the ground/bottom they are.
How does the Greenhouse Effect work?
Through radiation, convection currents, and our atmosphere, it traps in heat to allow a livable environment for organisms to live in.
Name two signs there has been a chemical change.
When Lithium (Li) and Bromine (Br) bond together, is it a covalent bond or an ionic bond?
Ionic, because a metal and a nonmetal have bonded together.
Give an example of all three types of heat transfer.
I'll look.
How does a chemical equation demonstrate the Law of Conservation of Mass?
It shows that nothing new is created from matter, nothing just appears, but it only changes form.