What's the matter
Has a definite volume but not a definite shape
What is a liquid?
What does KMT stand for?
Kinetic Molecular Theory
Which ELEMENT does the symbol "Kr" stand for/
Krypton
what is the formula for Density?
D=M/V
mixtures break down into two main categories...what are they?
Homogeneous and heterogeneous
What is matter?
Anything with Mass and volume
What state has particles that have enough energy to slide past each other?
A liquid
Which part of the periodic table tells us how many protons an element has.
The atomic number
Before you can compare densities of different materials you must make sure you are comparing the same __________________
Volumes
What was the name of the scientist who created the periodic table?
Dimitri Mendeleev
In what state are molecules really spread out, full of energy, and constantly moving around in random ways.
What is a gas?
What happens to water vapour particles if you cool it?
The particles slow down and condense into a liquid
How can we calculate how many neutrons an element has ?
Atomic mass take away the atomic number
If item A has a density of 4.56 g/ml and item B has a density of 6.45g/cm3 and item C has a density of 3.2g/ml, what will be the order of the layers?
C/A/B
What is the name of the family or group of non-metals next to the Noble gases ?
Halogens
Give three examples of something that is not matter
Heat energy, nuclear energy, light energy, thermal energy, gravitational energy...
KMT tells us that in order to have state change...what must happen?
What is it must gain or lose energy? (Must be heated or cooled)
What is the name of the most reactive metals group?
Alkali metals
The density of a material is 4g/ml and it has a volume of 9mL, what should be the mass?
36 grams ....M=DV
What is the difference between a solute and solvent/
Solvent does the dissolving and a solute gets dissolved.
What is occuring when a solid turns into a gas right away and provide an example.
Sublimation - Dry Ice
Give three out of 4 of the points made in the KMT .
- all matter is made up of tiny particles
-there is empty space between the particles
-the particles are in constant motion
- If we add heat energy ..particles move further apart, ...if we take away heat energy...particles come together
If Galliium has an atomic mass of approximately 70amu and its atomic number is 31, how many neutrons, protons and electrons does it have?
Protons and electrons is 31, neutrons is 39
Why does ice water not sink in liquid water?
Have a detailed explanation
water actually expands when it freezes and becomes less dense than the liquid form. Bonus 100 pts if they mention hydrogen bonding between water molecules
What is the name of elements that share properties of both metals and non-metals?
metalloids