Water
DRAW a water molecule
(check drawings for correct shape and atoms)
Which of the 2 types of combustion can produce negative after effects?
1. Complete Combustion
2. Incomplete Combustion
Incomplete combustion
True or False:
Metals are usually good conductors of electricity
True
What are the least reactive group of elements called?
Noble Gases (all the way on the right of the periodic table)
What does the word "polymer" stand for?
"many parts"
What is the density of water?
1 gram/mL
What is the horizontal line of a graph called? What is the vertical axis?
the "x" axis: horizontal
the "y" axis: vertical
If something is 'brittle" what does that mean will happen with the material is smashed?
It will shatter/break into smaller pieces
The atomic number of an element also gives you the amount of WHAT in that element:
1. Protons
2. Neutrons
3. Electrons
Protons
CnH2n+2
This formula is the formula for...
1. An Alkene
2. An Alkane
3. An Alkyne
Alkane
A __________ is the dissolving agent in a solution (does the dissolving) and the _________ is the substance that gets dissolved
Possible words: solute, mixture, solution, solvent,
A SOLVENT is the dissolving agent in a solution and the SOLUTE is the substance getting dissolved
If a cube has a:
1. Height of 3.6 cm
2. Length of 2.8 cm
3. Depth of 1.9 cm
What is the volume of the cube? (round to the nearest ._
19.2
What does "malleable" mean?
Able to be hammered or pressed permanently out of shape without breaking or cracking.
What 2 particles added together give you an element's atomic mass?
Protons + Neutrons
What is the difference between "cohesion" and "adhesion" ?
"Cohesion"- When molecules of the SAME substance stick to each other
"Adhesion"- When molecules of DIFFERENT substances are attracted to and stick together
If a cube is 3.8 gram/mL, will it sink or float in a glass of water?
SINK- anything weighing MORE than 1 gram/mL will sink in water
What is the difference between a "homogeneous mixture" and and "heterogeneous mixture" ?
Heterogeneous mixtures have visually distinguishable components, while homogeneous mixtures appear uniform throughout.
Name 2 characteristics of metals
malleable, ductile, good conductors...
The element "Florine" has a -2 charge. This atom is a...
1. Cation
2. Anion
3. Neutral
Anion
What are the 2 PRODUCTS of photosynthesis?
1. Oxygen
2. Glucose
How does water change when it freezes that is unique? WHY is important to aquatic life?
a. Water expands when it freezes, allowing it to FLOAT
b. Floating ice (icebergs) insulate and keep the water below from freezing, allowing life under the icebergs to flourish/survive
Chlorine has an atomic number of 17
-A mass of 35
-A -3 charge
1. Find the number of protons
2. Calculate the number of neutrons
3. Calculate the number of electrons
1. 17 protons
2. 18 neutrons (35-17)
3. 20 electrons
Magnesium has an atomic number of 12
-a mass number of 24
-a +1 charge
1. Find the number of protons
2. Calculate the number of neutrons
3. Calculate the number of elections
Protons- 12
Neutrons- 12 (24-12= 12)
Electrons- 11
Name 1 similarity between "combustion" and "cellular respiration"
Answers will vary