Atoms
Because they want to have a full valence shell to become stable.
Why do elements react?
This is the difference between atoms and ions.
What is ions have lost or gained electrons (have a charge)?
This type of bond forms between metals and non-metals.
What are ionic bonds?
This is the word equation for photosynthesis.
What is carbon dioxide + water --light energy--> glucose + oxygen?
This is the meaning of the term density.
What is the amount of stuff in a given space?
These elements are found in Period 1 and 2, on the Periodic Table.
What are metals?
These ions all have a +1 charge.
What are alkali (Group 1) metals?
This type of bond is formed between non-metals.
What are covalent bonds?
This is the process performed by mitochondria that releases carbon back into the atmosphere.
What is respiration?
This is the formula for density.
What is 'density = mass/volume'?
This is the number of electrons in the valence shell of the halogens.
What is seven?
These elements do not form ions.
What are the noble gases?
This is why simple molecules tend to have low melting and boiling points.
What are weak intermolecular forces?
These space objects have impacted Earth's climate several times in the past.
What are asteroids?
Substance A is less dense than substance B.
What determines that substance A will float on substance B?
These are the directions for the Groups and the directions for the Periods on the Periodic Table.
What are Groups go up/down, and Periods go across?
This is the rule that must be followed when drawing electronic structure diagrams.
What is the octet rule [2, 8, 8, 8]?
This is why ionic compounds tend to have high melting and boiling points.
What are strong electrostatic forces acting between every ion, in every direction?
This is the central atom in chlorophyll, which is found in the chloroplasts of plant cells.
What is magnesium?
Substance A is more dense than substance B.
What determines that substance A will sink in substance B?
This is why alkali metals become more reactive as we go down the Group.
What are weaker electrostatic forces as the electrons get further from the nucleus?
[2, 8]-2
What is the electronic structure for an oxygen ion?
This is the cross and dot diagram for the molecule formed by oxygen and fluorine.
(Draw on the board) O = [2, 6] F = [2, 7] x2
Excess carbon is being added to the atmosphere by this process and non-renewable energy source.
What are combustion and fossil fuels?
These are the 3 things that must be shown when doing a calculation in Mr. Ethan's class.
What are formula, math, and units?